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Old 03-26-2006, 03:36 PM
tommytom68 tommytom68 is offline
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Default Which Liquid Freezes faster?

I am hoping someone can help me. Little time to get to a library and I am burnt out on Science. Can someone help me find some websites that will allow me to help my son with his Science Project of...........Which Liquid Freezes faster? We need to answer Why things freeze? When they freeze, what conditions? and How does, what is in a liquid, effect how it freezes?

Any thoughts?
Please let me know.

Thank you.

Tom
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Old 03-29-2006, 06:32 AM
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Post Hope this Helped

I would like to know what kind of liquid that you are talking about is more of a like hot water vs cold water and you will be putting them in the freezer to see which freezes faster or what??

Hot water cools faster than cold water because they both follow
approximately the rate equation delta T = -k*dT/dt. The rate is
approximate primarily because of differences in convection, but
there is no doubt about average rate being higher for the hot
liquid.

People have claimed that the freezer has dry enough air that the hot
liquid will evaporate more than the cold liquid. This would result in
some additional heat being removed by the energy needed for vaporization
(thus speeding the rate it cooled), and more importantly, would result in
their being less water to freeze than the liquid that started cold. (Note: if you are using a close container it might also affect it.)


Well good luck!!
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Old 04-17-2006, 12:38 PM
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Quote:
Originally Posted by tommytom68
I am hoping someone can help me. Little time to get to a library and I am burnt out on Science. Can someone help me find some websites that will allow me to help my son with his Science Project of...........Which Liquid Freezes faster? We need to answer Why things freeze? When they freeze, what conditions? and How does, what is in a liquid, effect how it freezes?

Any thoughts?
Please let me know.

Thank you.

Tom
milk freeze the faster .it take for 30 min or 1 hour in a gallon.Why thing freeze ? When the atoms or molecules in a liquid are cooled,they don't rattle around as much. Then they can stick better to each other .The hared part to undstand then is not so much why liquid get sticker and have a harder time flowing when they're cold but rather why they abruptly form real crystals of soild- ordered patterns of atom or molecules.
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Old 04-17-2006, 02:00 PM
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Quote:
Originally Posted by tommytom68
I am hoping someone can help me. Little time to get to a library and I am burnt out on Science. Can someone help me find some websites that will allow me to help my son with his Science Project of...........Which Liquid Freezes faster? We need to answer Why things freeze? When they freeze, what conditions? and How does, what is in a liquid, effect how it freezes?

Any thoughts?
Please let me know.

Thank you.

Tom
Liquid freezes because it has a certain Freezing piont like water, its freezing point is 100 degrees. Find that of the liquid you need. What is in the liquid changes the viscosity, like if you put dirt into water its density changes. The molecules don't move past each other like before the dirt. That will mke the freezing point highten or lower.

hope all goes well,
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