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The Δ*H°*_{f} of gaseous dimethyl ether (CH_{3}OCH_{3}) is −185.4 kJ/mol; the vapor pressure is 1.00 atm at −23.7°C and 0.526 atm at −37.8°C. (a) Calculate Δ*H*°_{vap} of dimethyl ether.

__ Recall:__ The Clausius-Clapeyron Equation allows us to calculate the enthalpy of vaporization of a liquid using it's vapor pressures at different temperatures. It's given by:

where **P _{1} and P_{2} are the vapor pressure** of the liquid at

Clausius-Clapeyron Equation

Clausius-Clapeyron Equation

Clausius-Clapeyron Equation

Clausius-Clapeyron Equation