Physical Chemistry - vapor pressures

[belltos]

Homework Statement

At what temperature will isopropanol (Tbp = 82.5C) and carbon tetrachloride (Tbp = 76.7C) have the same vapour pressure? For isopropanol and carbon tetrachloride, the standard enthalpies of vaporization are 32.54 kJ mol-1 and 44.0 kJ mol-1, respectively.

Homework Equations

Clapeyron Equation?

The Attempt at a Solution

I don't really know how to get started.

Homework Statement

Homework Equations

The Attempt at a Solution

 

[Borek]

You are right about using Clapeyron equation.

What does boiling point mean? How is it related to vapor pressure?

--

 

[belltos]

The only relationship I know between boiling point and vapor pressure is that the boiling point is the temperature where the vapor pressure of a liquid is equal to external pressure.

 

[Borek]

External pressure is 1 atm - that means you are given p1, T1 and vaporization enthalpy for each substance. That's enough to find any p2/T2 pair.