Question

What is sublimation critical point?

Answer 1

Sublimation

• A change of state directly from solid to gas without changing into a liquid state is called sublimation.
• Sublimation is an endothermic phase transition of solid matter.

Sublimation critical point

• The maximum or minimum temperature and pressure beyond which the condition of the substance cannot be altered is referred to as the sublimation critical point.
• For example $-78.5°\mathrm{C}$ is the sublimation critical point of dry ice.