An isobar is a line of constant pressure which runs parallel to the temperature axis on the phase diagram for a substance. As we vary temperature along an isobar that lies below the triple point, which process would never be observed?

Question

Quizplus · Accepted Answer

Fusion, or melting, cannot occur below the triple point because the substance cannot exist in the liquid phase at pressures below the triple point.

An Isobar Is a Line of Constant Pressure Which Runs