How Does Temperature Affect Water Vapor Pressure?

[Qube]

Homework Statement

Determine the vapor pressure of water at 50 degrees C. The molar heat of vaporization of water is 40.7 kJ/mol.

Homework Equations

Clausius-Clapeyron equation.

The Attempt at a Solution

P1 = 760 mm Hg
T1 = 373 K

P2 = ?
T2 = 323 K

ln (P2/760) = ln P2 - ln 760 = -(40700/8.31)(1/323 - 1/373). I'm taking the change in temperature (delta T, or final minus initial temperature, and accordingly I put a negative out in front of the right side of the equation).

ln P2 = 4.6

e^4.6 = P2 = 100 mm Hg (approximately).

Is this correct?

 

[Borek]

Tables give 92.51 mm Hg, so you are reasonably close.

 

[Qube]

Thank you :-)!