Chapter 12, Problem 12.15P

Interpretation Introduction

Interpretation:

Each numbered point in the phase diagram for compound Q is to be matched with the correct molecular scene.

Concept introduction:

The phase diagram is a combination of liquid-gas, solid-liquid, and solid-gas curves and determines the effect of temperature and pressure on the phase of as a substance. The general phase diagram can be represented as follows:

Here,

BD is the fusion curve.

AB is the sublimation curve.

BC is the vaporization curve.

When a solid phase is converted into a liquid phase and when a liquid freeze it changes to a solid phase. The phase changes can be expressed as follows:

$\text{Solid}\underset{\text{Freezing}}{\overset{\text{Melting}}{\rightleftarrows }}\text{Liquid}$

When a liquid is vaporized it changes into the gaseous phase and when a gas condenses it converts to the liquid phase. The phase changes can be expressed as follows:

$\text{Liquid}\underset{\text{Condensation}}{\overset{\text{Vaporization}}{\rightleftarrows }}\text{Gas}$

When gas is sublimed it changes directly to the solid phase and when a solid is deposited it converts directly to the gas phase. The phase changes can be expressed as follows $\text{Gas}\underset{\text{Sublimation}}{\overset{\text{Deposition}}{\rightleftarrows }}\text{Solid}$