# Chapter 11 Intermolecular Forces and Liquids - Study Questions - Page 435f: 64

#### Work Step by Step

Performing a regression, we obtain: $ln\ P=-2804.8\ K/(T_C+273)+11.70$ Using the Clausius-Clapeyron equation, we find: $\Delta H_v=-2804.8×-0.008314\ kJ/mol.K=23.32\ kJ/mol$

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