# Problem: Methylamine has a vapor pressure of 344 torr at -25oC and a boiling point of -6.4oC . Find ΔHvap for methylamine.

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###### FREE Expert Solution

Clausius-Clapeyron Equation:

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

where: P2 = vapor pressure at T2

P1 = vapor pressure at T1

###### Problem Details

Methylamine has a vapor pressure of 344 torr at -25oC and a boiling point of -6.4oC . Find ΔHvap for methylamine.