Chapter 10, Problem 10.81QP

Interpretation Introduction

Interpretation: The temperature at which ${\text{CO}}_{\text{2}}$ solid is converted into ${\text{CO}}_{\text{2}}$ gas simply by lowering the pressure is to be stated.

Concept introduction: Triple point is a point present in the pressure- temperature graph. It is defined as the point at which all the three phases of a substance coexist in equilibrium with each other at a time.

Critical point is a point present in the pressure- temperature graph where two phases that is liquid and gas coexist in equilibrium. At this point gaseous and liquid states are indistinguishable from each other.

Critical temperature of a substance is defined as the temperature in which substance present in vapor state does not convert into the liquid state even if more pressure is applied in that substance.

To determine: The temperature at which ${\text{CO}}_{\text{2}}$ solid is converted into ${\text{CO}}_{\text{2}}$ gas simply by lowering the pressure.