Homework Help: AP CHEM-URGENT PLEASE

Posted by John on Thursday, January 24, 2008 at 3:24am.

at 25 degrees C liquid A has a vapor pressure of 100.0 torr, while liquid B has a vapor pressure of 200.0 torr. The heat of vaporization of liquid A is 32.0 kJ/mol and that of liquid b is 18.0 kJ/mol. At what celsius temperature will A and B have the same temperature.

I haven't the slighest idea how to solve this. What should I do first? Do I use the clausius-clayperon equation?

AP CHEM-URGENT PLEASE - drwls, Thursday, January 24, 2008 at 5:53am
I think you stated the problem incorrectly. Do you want the temperature at which the VAPOR PRESSURES are equal? If so, then yes, you do use the Clausius Clapeyron equation. The vapor pressure will be proportional to e(-Hv/RT), where Hv is the heat of vaporization

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