Chapter 12, Problem 12.94QP

Interpretation Introduction

Interpretation:

Referring to the given figure, the stable phase of ${\text{CO}}_2$ at (a) ${\text{4 atm and -60}}^{\text{°}}\text{C}$ and (b) $\text{0}{\text{.5 atm and -20}}^{°}\text{C}$ has to be determined.

Concept Introduction:

• Phase change refers to change in physical state of a substance.  If a substance undergoes change in its physical state from one physical form to another physical form, then the substance is said to be undergone phase change.
• Phase diagram illustrates temperature and pressure conditions at which a substance can remain stable at a certain physical state.  The distinct separation between the different phases of a system is known as phase boundary.