Define triple point.
A) the temperature, pressure, and density for a gas
B) the temperature at which the vaporization equals the melting point
C) the temperature and pressure where liquid, solid, and gas are equally stable and are in equilibrium
D) the temperature that is unique for a substance
E) the temperature at which the solid and gas co-exist

Question

Quizplus · Accepted Answer

The triple point is the temperature and pressure where solid, liquid, and gas are equally stable and in equilibrium. It is a specific point on a phase diagram and is unique for each substance. Option A is incorrect because density is not always included in the definition of triple point. Option B is incorrect because vaporization can occur at any temperature, not just at the triple point. Option D is partially correct, but it does not capture the full concept of the triple point. Option E is incorrect because it only includes the solid and gas phases, whereas the triple point includes all three phases.

Define Triple Point