Question

Chlorofluorocarbons (CFCs) are no longer used as refrigerants because they destroy the ozone layer. Trichlorofluoromethane (CCl₃F) boils at 296.95 K, and its molar heat of vaporization is 24.8 kJ/mol.

Calculate the molar entropy of the evaporation of CC₃F (l).

Answer 1

The molar entropy of the evaporation of Trichlorofluoromethan is 83.516 J/molK.

Step-by-step explanation:

Entropy :It is defined as amount of energy which is unable to do work or the measurement of randomness or disorderedness in a system.

`S=(Q)/(T(Kelvins))`

Molar heat of molar vaporization of Trichlorofluoromethane = 24.8 kJ/mol

Temperature at which Trichlorofluoromethan boils , T= 296.95 K

The molar entropy of the evaporation of Trichlorofluoromethan :

`=(24.8 kJ/mol)/(296.95 K)=0.083516 kJ/mol K = 83.516 J/molK`

The molar entropy of the evaporation of Trichlorofluoromethan is 83.516 J/molK.