What contains the most energy at 100 degrees celsius.. water or steam?

Answer 1

Wow. There are a lot of bad answers here. For a given mass, steam will have more energy than water. The difference is called the 'heat of vaporization'. One thing to be carefuls about, of course, is that a given mass of steam will occupy much more volume than the same mass of water.

Answer 2

At 100 degree celsius steam will have more energy. Consider the fact that a burn from steam can be fairly nasty. Water and steam can both exist at 100 degrees celsius.Steam has the more energy, and that is why the bond between the molecules are broken as energy is put in.

Also think about the fact that energy is put in, in the form of heat, and although this is happening the temperature does not increase. This energy cannot be destroyed, therefore it must be that steam has more energy.

This does not explain things clearly obviously, but it does answer your question.

Answer 3

Wow, a number of bad answers indeed.
A couple of things to clear up are that, number one, density does not indicate how much energy something has. Number two, becoming steam is not a release of energy; it is in fact the opposite. This misconception might have arisen from the mental image of steam being let out of a pressure cooker or kettle, and then there is no more pressure. This merely means that the water now takes up a larger amount of space, and hence more pressure.

What happens when water boils is that the water molecules take in energy to break the bonds that hold these molecules close enough to be liquid. Which is why, as an earlier answer points out, the temparature vs time (or energy supplied) graphs flatten out as it turns to steam. This is because the energy, instead of being used to increase temperature, is being taken in to become steam. Thus, steam at 100 degrees celsius has more energy than water, assuming of course that it's the same amount of water that turned to steam. The answer only holds if the number of molecules are the same for steam and water, not for equal volumes of both.

Answer 4

That's a trick question. At standard pressure (i.e. 1 atmosphere) it's physically impossible for liquid water to reach 100 degress C. It changes into steam as it reaches that tempterature so the answer is steam as water can't reach that temperature.

If you're ever relly bored one day you can try it, stick a thermometer in a flask of water over a bunsen and watch. The thermometer will never quite reach 100, always hovering around 99ish.

Answer 5

At 100 degrees Celsius and with an equal mass the steam would contain more energy then the water.

To calculate the energy contained in each sample two different equations are used. The energy produced/required while heating or cooling is represented by: Energy (E) = mass(m) *specific heat capacity(c) * Change in temperature(∆T). The energy produced while changing state (IE. changing from a liquid to a gas) is represented by: Energy (E) = moles(n)* molar enthalpy change(∆H).

Example: 18.02g of H2O(l) is being heated from 75.0ºC to 100.0ºC. How much energy does the the H2O have before and after it vaporises?

Answer:
E(before)=mc∆T
E(before)=(18.01g)(4.18J/gºC)(100.0ºC-75.0ºC)
E(before)=1880J

E(after)=mc∆T+n∆H
E(after)=(18.01g)(4.18J/gºC)(100.0ºC-75.0ºC)+(18.01g)/(18.01g/mol)(40800J)
E(after)=1880J+40800J
E(after)=42680J

As you can see after the vaporisation of the water it has 42680J of energy compared to the 1880J contained by the water before the vaporisation.

Answer 6

Steam. The molecules have greater degrees of freedom available to them and are free in ways that water molecules are not.

If you look at a temperature chart over time as you boil water, you'll notice that at 100deg, the line flattens out for a bit (ie no temp change), as it converts to steam. This is because the water uses all of the heat energy to convert itself into steam.

Answer 7

Steam, it takes one calorie of energy to raise one gram of water by one degree. Once water reaches 100 degrees C, then it takes another 1/2(as best as I can remember it is 1/2, the point is it takes energy to convert to steam) of a calorie, to convert one gram of water to one gram of steam. even though the temperature remains 100 degrees C. So you can see that one gram of steam has 1/2 of a calorie more energy than a gram of water.

Answer 8

steam contains 560calories of latent heat.water transforms into steam absorbing this heat.hence it gives severe blister compare to boil water.steam contains the most energy at 100 degrees celsius

Answer 9

there's a multitude of somewhat undesirable technological awareness in many of the solutions above - I blame the Thatcher years of Tory training cuts! additionally the question is faulty, in view that steam is water, yet at a distinctive potential point - i assume you recommend water as a liquid whilst in comparison with water as a gas. putting potential right into a gadget will advance its interest - i.e. the extra potential the extra energetic the gadget. of direction, the potential has to come again from someplace else outdoors of the actual gadget, with the aid of fact it can not be created or destroyed. to alter water from its liquid state to its gaseous state demands a piece substitute, which demands a large enter of extra potential prevalent with the aid of fact the latent warmth of vapourisation. the certainly temperature at which this occurs relies upon on the stress in the gadget. This potential is given up in the opposite technique, as witnessed by making use of the huge quantity of burn harm brought about by making use of steam whilst in comparison with warm water at a matching temperature. for this reason, that's actual sparkling that for the comparable mass the steam could contain lots extra entire potential. that's that this further potential which motives the molecules to bypass swifter and for this reason remodel right into a gas.

Answer 10

steam.refer to this formla:Q=ml
where Q is energy,mis mass and l represents spesific latent heat of vaporisation.
for your information,the specific latent heat of vaporisation of steam is 2.26*10^6 .



Anyway,in physics the state of water at 100 degrees is steam and not water..because the water changes to steam at 100 degrees celcius