The triple point of a substance is
A) the point at which the vapor pressure of the solid is 1 atm.
B) the point at which its solid, liquid, and vapor are all in equilibrium.
C) the point at which the liquid starts to condense as the temperature of the vapor is lowered.
D) the point at which the density of the solid and the liquid are equal.
E) none of these

Question

Quizplus · Accepted Answer

The triple point of a substance is the temperature and pressure at which its solid, liquid, and vapor phases are all in equilibrium. At the triple point, the three phases coexist and are in equilibrium, meaning that any slight deviation from these conditions will cause one phase to dominate over the others.

The Triple Point of a Substance Is