Chemistry question, help! |
 Nov 5 2008, 02:24 AM
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#1
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Newbie  Group: Member Posts: 8 Joined: Nov 2008 Member No: 695,844  |
Hi
I have one more question left and I have 30 minutes to do it and I can't figure it out. I would appreciate any help!! The vapor pressure of water at 25.0 C is 23.8 torr, and the heat of vaporization is 43.9 kJ/mol. What is the vapor pressure (atm) of water at 43.6C ? |
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Nov 5 2008, 02:38 AM
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#2
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Newbie Group: Member Posts: 8 Joined: Nov 2008 Member No: 695,844 |
Anyone!? 23 minutes left!
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Nov 5 2008, 02:41 AM
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#3
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Newbie Group: Member Posts: 8 Joined: Nov 2008 Member No: 695,844 |
Anyone!? 19 minutes left!
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Nov 5 2008, 02:44 AM
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#4
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Newbie Group: Member Posts: 8 Joined: Nov 2008 Member No: 695,844 |
Anyone!? 16 minutes left!
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Nov 5 2008, 02:49 AM
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#5
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Newbie Group: Member Posts: 8 Joined: Nov 2008 Member No: 695,844 |
Anyone!? I have 11 minutes left!
My chemistry assignments are always due at 3 AM. |
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Nov 5 2008, 02:56 AM
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#6
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Newbie Group: Member Posts: 8 Joined: Nov 2008 Member No: 695,844 |
You're a f ucking d yke
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Nov 5 2008, 02:58 AM
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#7
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 Senior Member Group: Member Posts: 944 Joined: Jul 2008 Member No: 663,413 |
I took Chem. 2 semesters ago and did pretty good... but It all flew outta my head! sorry
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Nov 5 2008, 12:15 PM
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#8
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 Senior Member Group: Official Member Posts: 2,936 Joined: Sep 2008 Member No: 683,235 |
QUOTE(obamalama @ Nov 5 2008, 02:56 AM)  You're a f ucking d yke That's pretty unnecessary, and what they told you to do was pretty good advice. Don't expect answers right away, and it isn't anyone here's job to do YOUR work. :] |
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| *Janette* |
Nov 5 2008, 01:36 PM
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#9
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Guest |
this is late but whatev.
Use ln P2/P1 = - (delta H vap / R) * (1/T2 - 1/T1) P1 =23.8 torr P2 = ? T1 = 25 + 273 = 298 K T2 = 43.6 +273 = 316.6 K delta H vap = 43.9 kJ/mol R = 8.314*10^-3 kJ /mole /K By substituting above values and solving the equation P2 = 67.35 torr |
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