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Topic: Vapour Pressure Problem  (Read 2779 times)

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Offline Boxxxed

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Vapour Pressure Problem
« on: January 26, 2011, 10:27:28 PM »
Assume you seal 1.0 g of diethyl ether in an evacuated 0.10 L flask.  If the flask is held at 30oC, what is the approximate gas pressure in the flask?  If the flask is placed in an ice bath, does additional liquid ether evaporate or does some ether condense?


I've calculated pressure to be 3.23 atm. Why does it say 75 kpa in my notes?
It also says 0.22 grams evaporate and 0.78 grams remains liquid. Where is this coming from?
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Offline rabolisk

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Re: Vapour Pressure Problem
« Reply #1 on: January 26, 2011, 10:51:13 PM »
How did you get those values?
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Offline Boxxxed

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Re: Vapour Pressure Problem
« Reply #2 on: January 26, 2011, 10:56:29 PM »
I figured it out I think. The 75 kpa was derived from a chart in the text, not algebraically which is where I was confused.
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Offline rabolisk

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Re: Vapour Pressure Problem
« Reply #3 on: January 26, 2011, 10:59:57 PM »
How did you arrive at 3.23 atm?
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