Chloroflurocarbons (cfcs) are no longer used as refrigerants because they destroy the ozone layer. trichlorofluoromethane (ccl3f) boils are 23.8c and its molar heat of vaporization is 24.8 kj/mol. calculate the molar entropy of evaporation of cc3f (l)

83.60 J/k mol

Explanation:

The molar entropy of vaporization,ΔS vap   is given by the expression:

ΔS vap = ΔHvap / Tb  where

ΔHvap = molar enthalpy change of vaporization, J/mol

Tb = boiling temperature, K

We have both  ΔHvap, and Tb so lets solve our question.

T= (23.8 + 273) = 296.8 K

ΔHvap = 24.8 kJ = 24.8 x 10³ J

ΔS vap = ΔHvap / Tb = 24.8 x 10³ J/mol / 296.8 K = 83.6 J/k mol

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