Question

In which region is the substance in both the solid phase and the liquid phase?

a) Triple Point
b) Critical Point
c) Phase Transition Point
d) Equilibrium Point

Answer 1

The region in which a substance exists in both the solid phase and the liquid phase is called the triple point. It is the combination of temperature and pressure at which all three phases (solid, liquid, and vapor) can coexist in equilibrium.

Step-by-step explanation:

The region in which a substance exists in both the solid phase and the liquid phase is called the triple point. The triple point is the combination of temperature and pressure at which all three phases (solid, liquid, and vapor) can coexist in equilibrium. It is represented on a phase diagram as the point where the solid/liquid, liquid/gas, and solid/gas lines intersect.