# Problem: Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1°C.At what temperature does benzene boil when the external pressure is 405 torr?

###### FREE Expert Solution

For this problem, we can use the Clausius-Clapeyron Equation:

$\overline{){\mathbf{ln}}\left(\frac{{\mathbf{P}}_{\mathbf{2}}}{{\mathbf{P}}_{\mathbf{1}}}\right){\mathbf{=}}{\mathbf{-}}\frac{\mathbf{∆}{\mathbf{H}}_{\mathbf{vap}}}{\mathbf{R}}\left(\frac{\mathbf{1}}{{\mathbf{T}}_{\mathbf{2}}}\mathbf{-}\frac{\mathbf{1}}{{\mathbf{T}}_{\mathbf{1}}}\right)}$

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###### Problem Details

Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1°C.

At what temperature does benzene boil when the external pressure is 405 torr?