Heat of sublimation can be approximated by adding together and .
A) heat of freezing (solidification), heat of condensation
B) heat of fusion, heat of condensation
C) heat of freezing (solidification), heat of vaporization
D) heat of fusion, heat of vaporization
E) heat of deposition, heat of vaporization

Question

Quizplus · Accepted Answer

Heat of sublimation is the energy required to change a solid directly into a gas without going through the liquid state. This process involves both the breaking of intermolecular forces between particles in the solid and the additional energy required to overcome the attractive forces between particles in the gas phase. Therefore, the heat of sublimation can be approximated by adding together the heat of fusion (energy required to melt a solid) and the heat of vaporization (energy required to vaporize a liquid). Choice D includes these two types of energies.

Heat of Sublimation Can Be Approximated by Adding Together and