At the triple point of a substance, ________
A)three phases are present in equilibrium.
B)the solid sublimes.
C)the gas condenses to a liquid.
D)solid and liquid are in equilibrium.
E)only one phase appears to be present.

Question

Quizplus · Accepted Answer

At the triple point of a substance, three phases (solid, liquid, and gas) are present in equilibrium. This is the unique temperature and pressure at which all three phases can coexist.

At the Triple Point of a Substance, ________