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Topic: Cyclohexane, Freezing Point, Vaporization  (Read 5524 times)

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Offline jcais

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Cyclohexane, Freezing Point, Vaporization
« on: June 16, 2006, 06:33:06 PM »
Hello,

We had an experiment that involved finding the freezing point of cyclohexane. If some of the cyclohexane evaporates during the exp., how would this affect the freezing point determination?

I am thinking it would raise the freezing point because less of it is there so you don't need a very low freezing point. But, I don't know. Every 30 seconds the temp decreased. The Tf was 6.5C. The temp decreased. Does this mean that the vaporization of cyclo. results in a lowering of freezing point?

THank you for your help.

Offline Yggdrasil

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Re: Cyclohexane, Freezing Point, Vaporization
« Reply #1 on: June 16, 2006, 07:45:48 PM »
Is freezing point (or temperature, in general) an extensive or intrinsic property.  In other words, do these properties depend the size of the system?  Would 1 cup of [water] freeze at a different temperature of two cups of water?
« Last Edit: June 16, 2006, 07:51:27 PM by Mitch »

Offline jcais

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Re: Cyclohexane, Freezing Point, Vaporization
« Reply #2 on: June 16, 2006, 08:51:33 PM »
Quote
Is freezing point (or temperature, in general) an extensive or intrinsic property.  In other words, do these properties depend the size of the system?  Would 1 cup of [water] freeze at a different temperature of two cups of water?

I think the size does not matter regarding the water, but am unsure.
« Last Edit: June 17, 2006, 03:42:34 AM by Borek »

Offline Mitch

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Re: Cyclohexane, Freezing Point, Vaporization
« Reply #3 on: June 16, 2006, 09:24:18 PM »
You are right. :)
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Offline jcais

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Re: Cyclohexane, Freezing Point, Vaporization
« Reply #4 on: June 17, 2006, 11:30:30 AM »
Thank you for your help. :-)

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