Methane has a heat of fusion of 0.84 kJ/mol and a heat of vaporization of 9.2 kJ/mol. Estimate the value for the heat of sublimation.
A) 12.0 kJ/mol
B) 11.0 kJ/mol
C) 10.0 kJ/mol
D) 9.00 kJ/mol
E) 8.00 kJ/mol

Question

Quizplus · Accepted Answer

The heat of sublimation is the sum of the heat of fusion and heat of vaporization. Therefore, heat of sublimation = heat of fusion + heat of vaporization = 0.84 kJ/mol + 9.2 kJ/mol = 10.04 kJ/mol. The closest answer choice is C, which is 10.0 kJ/mol.

Methane Has a Heat of Fusion of 0