How much energy is required to completely vaporize 250 grams of liquid water that is already at 100 degrees Celsius? Show your work & units. Expected Answer = 565,000 J
Answers
Answer:
564100J (~ 565000J) of heat energy is required.
Explanation:
The enthalpy of vaporization of water is 2256.4J/g, meaning that 2256.4J of heat is required to convert 1 gram of water at 100 degrees Celcius to steam at 100 degrees Celcius.
In your case, we have 250g of water at 100C and we want to vaporize it to steam (also at 100C).
This requires ΔH = 2256.4(250) = 564100J of heat energy.
Related Questions
Which of the following statements is true?
Like magnetic poles attract each other
There is no relationship between magnetic poles
Like magnetic poles repel each other
Answers
Answer:
Like magnetic poles repel each other
Explanation:
Among the following statements, the one that is true is Like magnetic poles repel each other.
What are magnets?Magnets are substances which possess their own magnetic field this magnetic field basically arises from the circular movement of negatively charge electrons. The elements which have unpaired electrons and have spin angular momentum or orbital angular momentum or they are together present are called as Magnets.
The magnetic field present is invisible but it is definitely responsible for the most notable property of a magnet. Magnetic force is a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets.
Therefore, Among the following statements, the one that is true is Like magnetic poles repel each other.
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Specific Heat and Thermal energy question. 30 points, will give brainliest. Please answer. Pic attached
Answers
Need help with this.
Answers
Answer: It's C
Explanation: All of the other reaction are physical reaction.
The diagram shows a food web in a grassland.
What best describes the role of the grasshopper in the food web?
Group of answer choices
A primary consumer that is food for the lizard and hawk
A secondary consumer that is food for the lizard and hawk
A primary consumer that is food for a single predator, the lizard
A secondary consumer that is food for a single predator, the lizard
Answers
Answer:
I think it is a sorry if i'm wrong
Explanation:
Which statement best describes the message of the poem? *
It about icruas flight pls help and it is the poem not the myth
A Icarus flew too far for no good reason.
B Icarus learned something by flying too far.
C Icarus had a habit of flying too far.
D Icarus was excited by flying too far.
Answers
Lucia is given a picture of several cells. Her task is to identify the cells as plant or animal
cells. How can she pinpoint the cells that are plant cells?
A. She should look for a cell membrane surrounding the cell.
B. She should look for cytoplasm that is filled with organelles.
C. She should look for a large nucleus in the center of the cells.
D. She should look for ovals full of green dots called chloroplasts
Answers
Plant cells have a cell wall, animal cells do not.
Answer:
D She should look for ovals full of green dots called chloroplasts
Explanation:
Plant cells are the only cells that will have chloroplast as it helps the plant go through photosynthesis.
THIS IS A REPOST I WILL STILL GIVE BRAINLIEST FOR ALL ANSWERED QUESTIONS
Directions: Identify the manipulated variable and responding variable for each hypothesis.
HINT: If (fill in manipulated variable), then (fill in responding variable)
1. If plants are watered, then growth height will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
2. If chocolate is given to teachers, then amount of homework will decrease.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
3. If trees have leaves, then bird nests will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
4. If acid rain is in water, then fish population will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
5. If calcium is given, then bone strength will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
Answers
1. Manipulated: Water
Responding: Growth Height
2. Manipulated: Chocolate Given
Responding: Amount of Homework
3. Manipulated: Trees with Leaves
Responding: Number of Bird Nests
4. Manipulated: Acid Rain
Responding: Fish Population
5. Manipulated: Calcium Given
Responding: Bone Strength
Think about the manipulated variable as the changing item in the experiment. If this changes, the response will. (This is the Independent Variable)
Think of the Responding Variable as the result of the variable only can change when Manipulated is changed. (This is the Dependent Variable)
Hope This Helps :)
Manipulated variable in each case are watering of plants, number of chocolates, trees having leaves,water in acid rain, amount of calcium respectively and responding variables are growth height, amount of homework,number of bird nests,fish population,bone strength.
What are variables?Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.
There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change
Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.
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Please Help Part B to question A
Researchers have been studying how emissions from both volcanoes and human activities, such as the burning of fossil fuels, impact the atmosphere. Both types of emissions contribute to the total CO2 levels in the atmosphere. Graph 2 shows that atmospheric CO2 levels have been steadily increasing over time. This increase in CO2 levels has been linked to the increase in global surface temperatures.
Identify the part of the slow carbon cycle in which the total amounts of carbon is most likely decreasing the most and explain why this decrease occurs.
Answers
Answer:
Over the last century the burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO2). This happens because the coal or oil burning process combines carbon with oxygen in the air to make CO2. as u know decreasing means going down and increasing means going up. the reason why things decrease means something went wrong or something to happen to make it go down we all try to make things increase which means we try to make things go up instead of down. a lot of reasons is y things decrease is bc during the period of time something might go wrong or happen in a bad way that makes a lot of things decrease. for example like temperature when the temperature decreases it means it goes down and it might get cold but if the temperature increases it goes up so it might be ht or warm or maybe even cool. if something ever decreases it means during the period of time something bad happened and made it go down instead of up if something ever goes wrong that means something decreased. sometimes decreasing could be a good thing but most of the time it it bad but there are sometimes when decreasing is good but not all the time.
The part of the slow carbon cycle in which the total amounts of carbon is most likely decreasing the most is from 1960 to 1970.
What the given graph shows?Over the last century the burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO2). This happens because the coal or oil burning process combines carbon with oxygen in the air to make CO2. As you know decreasing means going down and increasing means going up. The reason why things decrease means something went wrong or something to happen to make it go down we all try to make things increase which means we try to make things go up instead of down. A lot of reasons is why things decrease is because during the period of time something might go wrong or happen in a bad way that makes a lot of things decrease. For example, Temperature. When the temperature decreases it means it goes down and it might get cold but if the temperature increases it goes up so it might be hot or warm or maybe even cool. If something ever decreases it means during the period of time something bad happened and made it go down instead of up if something ever goes wrong that means something decreased.
Therefore, The part of the slow carbon cycle in which the total amounts of carbon is most likely decreasing the most is from 1960 to 1970.
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Scientists claim that climate change is happening because Earth is warming. They also claim that humans have helped cause the warming by adding greenhouse gases to the atmosphere. Other people claim that Earth is not experiencing climate change because some winter days are still very cold. Use evidence to evaluate each claim about climate change.
help
this is science.
Answers
Answer:
There is solid proof that global warming is increasing and getting worse by t he day. The ice caps slowly melt more and more each year due to this which is a proven fact. On top of that, it has been proven that carbon emission by humans is bad for the environment and it helps increase the problem of global warming by weakening our atmosphere. As for the cold days, just because we have global warming doesn't mean the earth weather wont be cold. global warming is something that slowly happens and over time the temperature global has actually been increasing at a not very notice able pace.
Explanation:
Yes, climate is changing because of the human activities which are causing harm to the environment causing global warming.
What is global warming?Global warming is the long-term warming of Earth's climate system that has been seen from the pre-industrial period (between 1850 and 1900) as a result of human activity, principally fossil fuel combustion, which raises heat-trapping greenhouse gas levels in the atmosphere.
Evidence which claim about climate changeGreenland, Antarctica, and tropical mountain glaciers have all provided ice cores that illustrate how the Earth's climate responds to fluctuations in greenhouse gas levels. Tree rings, ocean sediments, coral reefs, and layers of sedimentary rocks all contain ancient data.Yes, 97 percent of actively published climate scientists agree that people are to blame for global warming and climate change.Based on the data, nearly 97 percent of climate scientists agree that human-caused climate change is happening, according to the American Association for the Advancement of Science (AAAS).To know more about Global warming here
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A 200 g sample of water at 60.0 degrees Celsius is heated to water vapor at 140.0 degrees Celsius. Expected Answer = 501,440 J Before trying to solve this problem, explain:
what is happening to the water from 60.0 degrees Celsius to 100.0 degrees Celsius?
what happens at 100.0 degrees Celsius?
what happens from 100.0 degrees Celsius to 140.0 degrees Celsius?
Then solve the full problem, showing work & units.
Answers
why is Galileo Galilei impotant?
Answers
Answer:
He provided a number of scientific insights that laid the foundation for future scientists. He also improved telescope that helped further the understanding of the world and universe.
Explanation:
Answer:it’s because Galileo Galilei is pretty much the father of today’s modern science
Explanation:
I hope this helps :)
If you get this right, I'll teach you how to out pizza the hut :)
Answers
Answer:
Lightning rods (and the accompanying protection system) are designed to protect a house or building from a direct lightning strike and, in particular, a lightning-initiated fire, Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. One way to discharge them is through a circuit, and An electroscope is an early scientific instrument used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it.
Explanation:
Im smart
ok so the question is Sort the processes based on the type of energy transfer they involve. condensation
freezing
deposition
sublimation
evaporation
melting and the catigoreies are thermal energy add or thermal energy removed.
Answers
Maybe evaporation???????????????
Answer:
Maybe evaporation and sublimation??????????????????????
Explanation:
Which’s a mixture
A. Propane
B. Carbon
C. Gasoline
D. Ozone
Answers
Answer:
Air is a mixture of approximately 80% nitrogen, 20% oxygen and a small amount of many other gases.
Explanation:
Plants and animals exchange materials through the processes of photosynthesis and respiration. Which of these statements is true about the way these two processes are related?
AThe products of photosynthesis inhibit respiration
B.The products of photosynthesis are also the products of respiration
C.The reactants of photosynthesis are also the reactants of respiration
D.The products of photosynthesis are the reactants of respiration
Answers
Answer:
B i am pretty sure wait no yeah it is the answer B
Answer:
I think it is The products of photosynthesis are also the products of respiration
Explanation:
The Moon takes about one month to orbit Earth. Based on what you have learned and know, there would be two eclipses (one lunar and one solar) every month. Do you think this is realistic? Explain why or why not.
Answers
Answer:
it would not be
Explanation:
because the moon doesn't always go into earth's shadow
Answer:
It's true that the moon goes around Earth every month, but it doesn't always get in Earth's shadow. The moon's path around Earth is tilted compared to Earth's orbit around the sun. The moon can be behind Earth but still get hit by light from the sun. ... This is why we don't get a lunar eclipse every month.
Explanation:
The Newton is the SI unit for ____.
temperature
density
weight
mass
Answers
Answer:
Mass
Explanation:
Which type of graph would best represent data from this experiment: Measuring the growth of a plant over 2 weeks? Question 1 options:
A. Line graph
B. Bar graph
C. Circle graph
Answers
The planet Venus is surrounded by a thick layer of gases. In fact, the atmospheric pressure on Venus is over 90 times greater than the atmospheric
pressure on Earth. Which statements are true about boiling water on Venus? Choose the two statements that apply.
A. Water will boil at a higher temperature on Venus than on Earth.
B. Water will boil at a lower temperature on Venus than on Earth.
C. The temperature of water will remain constant while it boils.
D. The temperature of water will increase as it boils.
Answers
Answer:
d
Explanation:
help please!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
HCl , Chocolate Milk , NaCl + H2O, Sand + H2O , Tea + Sugar
Explanation:
here the answer Deku
Do plant and /or animal cells uses energy to carry out life processes?
Answers
Answer:
Yes/true/correct
Explanation:
I hope this helps! ^^
helpppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
A.
Explanation:
thnx for the brinliest
Mia looked at a graph showing average global temperatures. She noticed that the average temperatures have risen abruptly over the past several decades. This indicates that global warming is occurring at a fast rate. What additional pieces of evidence do scientists use to support the idea that global warming is happening?
Question options:
the amount of greenhouse gases leaving the atmosphere and increases in amounts of sea ice
the greenhouse effect and reductions in sea levels
greenhouse gas concentrations, decreases in amounts of sea ice, and increases in sea levels
ocean temperature changes, greenhouse gases concentrations, and harmful emissions reductions
Answers
The idea of global warming is happening is supported by increasing greenhouse gases concentrations, decreases in amounts of sea ice, and increases in sea levels.
Global warming is purported to be due to the inability of reflected solar radiation to travel back to space as a result of greenhouse gases forming a layer of blanket over the atmosphere.
Thus, an increase in the concentration of greenhouse gases correlating with an increase in global temperature is one piece of evidence used to support the idea of global warming.
Also, it is logical that increased global temperature will lead to the melting of sea ice and the resulting water will cause a rise in the levels of seas. The existence of these phenomena reinforces the idea that global warming is actually a thing.
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Which of these statements about gravity are true?
Gravity helps us stay situated on Earth without floating away.
Gravity gives objects their mass.
Gravity holds our galaxy together.
Multiplying the mass of an object by the acceleration due to gravity gives the weight of the object.
Gravity helps scientists launch spacecraft out of Earth’s atmosphere.
Answers
Answer:
gravity holds our galaxy together
Explanation:
that is why we don't levitate into the air
The water cycle is also called the Hydrolic Cycle.
It is the process by which water circulates between Earth’s oceans, atmosphere, and land.
It involves the following:
Water storage
evaporation
transpiration
_________________________
_________________________
_________________________ hold 96.5% of Earth’s water.
This is the primary pathway into the water cycle.
Oceans, seas, lakes, and rivers provide _____% of the moisture in our atmosphere through evaporation.
The process by which water changes from a _________________________ to a _________________________ .
It is the primary pathway that water moved from the liquid state back into the water cycle as _________________________ .
_________________________ (energy) from the sun is necessary for evaporation to occur.
Energy _________________________ bonds that hold water molecules together.
Boiling Point: _________________________
Freezing Point: __________________________
_________________________ is the process of snow and ice changing into water vapor without first melting into water.
_________________________ is water lost to the atmosphere when the ground surface and transpiration of groundwater by plants through leaves.
Superhighway used to transport water around the globe.
Involves _________________________ and _________________________ .
The process in which water vapor in the air changed into _________________________ .
The loss of _________________________ allows water molecules to bond,
Forms _________________________ or _________________________ .
Is water released from clouds in the form of:
_________________________
_________________________
_________________________
_________________________
_________________________
Provides the delivery system of _________________________ water to the Earth.
These are examples of water locked up in its present state of matter for a relatively long period of time.
This involves _________________________ and _________________________ .
This is _________________________ that did not get absorbed into soil, or evaporate.
_________________________ and _________________________ provides runoff when they melt._________________________
Water moved by _________________________ makes its way into places that collect water.
_________________________
_________________________
_________________________
_________________________
This is the downward process of moving water from the _________________________ into soil or poros rock.
_________________________ is large amounts of water stored in the ground.
_________________________ is another name for groundwater.
This is the area of land where all the water that dallas in it and grains off of, goes into the same place.
It can be as small as a footprint or as large as all the land that drains water into the _________________________ .
Answers
Answer:
transpiration
Explanation:
I just need points
Which is one characteristic that temperate marine and temperate continental climates have in common?
mild winters
hot summers
many tall trees
moderate amounts of precipitation
Answers
Answer: D : moderate amounts of precipitation
Explanation:
The one characteristic that temperate marine and temperate continental climates have in common is moderate amounts of precipitation. Thus, the correct option for this question is D.
What is Climate?Climate may be characterized as the long-term pattern of weather in a particular area. It is different from the weather in a way that can change from hour to hour, day-to-day, month-to-month, or even year-to-year.
According to the context of this question, A maritime climate is influenced by a nearby ocean. A continental climate is influenced by nearby land. The temperature of offshore currents affects nearby land areas.
A maritime climate is less extreme than a continental climate because the ocean moderates temperatures. Due to this, both temperate marine and temperate continental climates have moderate amounts of precipitation.
Therefore, the correct option for this question is D.
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Which of the following is an example of a response to stimulus?
you are tired
you are hot
you eat food
you are scared
Answers
Option C. you eat food.
What is an example of a response to a stimulus?Examples of stimuli and their responses: You are hungry so you eat some food. A rabbit gets scared so it runs away. You are cold so you put on a jacket.
Which is not an example of a response to a stimulus?The hatching of a chick out of an egg is not an example of a response to stimulus as it is a natural process of the birth of new ones.
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The image on the left shows a normal red blood cell, and the image on the right shows a cell that has been put into a new solution. The circles represent the salt in the solutions.
Which statement describes the motion of the water molecules in this situation?
The water molecules move by active transport into the cell from low water concentration to high water concentration.
The water molecules move by osmosis into the cell from low water concentration to high water concentration.
The water molecules move by osmosis into the cell from high water concentration to low water concentration.
The water molecules move by active transport into the cell from high water concentration to low water concentration.
Answers
Answer:
C. The water molecules move by osmosis into the cell from low water concentration to high water concentration.
Explanation:
The environment in picture 2 (the solution) has less solute (salt) and more water than in picture 1. Since the cell was isotonic (the same concentration of solute exists inside and outside the cell), if the cell were to be placed in an environment with more water, like in picture 2, water would diffuse through osmosis INTO the cell in order to maintain the same concentration of solute by diluting the solute present in the cell.
If the inclination angle is 15 how does the path of the Sun in the sky change as the planet moves from the right side of its orbit to the left?
Answers
Answer:
There is no change in the angle at which sunlight strikes the ground. When the inclinatio n angle is 23 degrees, the longest sunlit period is about 15 hours, and the shortest is about 9 hours.
Explanation:
Please help ill mark branliest (im using the last of my points for this so please don't scam me)
can someone write about genetically modified foods and the genetic modification process?
Answers
Answer:
ok :)
Explanation: genetically modified organisms (GMOs) are being made by inserting a gene from an external source such as viruses, bacteria, animals or plants (etc) into foods. Genetically modified foods seem to be not as healthy as unmodified foods, according to research. also many people are against it due to the fact that some people go overboard and add too many genetically modified organisms, which causes health risks and unfortunately harms people. sometimes genetically modified food contains toxins and antibiotics. srry i couldnt find much on the process but this is based off my background knowledge so yeah