Exercise 9 | Chemical Thermodynamics
General Chemistry 3 - Exercise 9
Calculate ΔH0vap [Br2] given that the vapor pressure of bromine is 133 Torr at 293K and 48.1 Torr at 273K.
Clapeyron-Clausius equation :
ln = x
ΔH0rxn = R ln x
Situation 1: P1 = 133 Torr and T1 = 293K
Situation 2: P2 = 48.1 Torr and T2 = 273K
ΔH0vap = 8.314 x ln x
ΔH0vap = 33.8 kJ.mol-1