V = n ution ng Ts P 36,200 mol min V = 550 m N/min = 0.0224 m Vapor Pressure Estimation Using the Clausius-Clapeyron Equation mple:1 e vapor pressure of benzene is measured at two temperatures, with the following results: T = 7.6C, Pi = 40 mm Hg T = 15.4C, P = 60 mm Hg p*(mm Hg) 40 60 lculate the latent heat of vaporization and the parameter B in the Clausius-Clapeyron equation and th imate p* at 42.2C using this equation. 1 mol In(p/pi) [(1/T)-(1/T)] 300 K 273 K = T(C) 7.6 15.4 760 mm Hg 1238 mm Hg e slope of the line through the two data points on a plot of ln p* versus 1/T is , TT In(p/P) (T1 - T) R T(K) 280.8 288.6 (280.8 K) (288.6K) ln(60 mm Hg/40 mm Hg) (280.8-288.6) K = -4213 K