Equilibrium vapor pressures of benzene, C 6 H 6 , at various temperatures are given in the

Question:

Equilibrium vapor pressures of benzene, C₆H₆, at various temperatures are given in the table. Temperature (C) Vapor Pressure (mm Hg) 7.6 40. 26.1 100. 60.6 400. 80.1 760.

(a) What is the normal boiling point of benzene?
(b) Plot these data so that you have a graph resembling the one in Figure 11.12. At what temperature does the liquid have an equilibrium vapor pressure of 250 mm Hg? At what temperature is the vapor pressure 650 mm Hg?
(c) Calculate the molar enthalpy of vaporization for benzene using the Clausius–Clapeyron equation.

Data given in Figure 11.12

Pressure (mm Hg) 1000 800 600 400 200 0 760 mm Hg -20 Diethyl ether 0 20 Normal BP 34.6 C Ethanol 40