Chapter 9, Problem 43QRT

(a)

Interpretation Introduction

Interpretation:

The type of phase present in region A, B and C has to be identified.

Concept introduction:

Every pure substance that exists in all three phases has a characteristic phase diagram as below.

Figure 1

(b)

Interpretation Introduction

Interpretation:

The phases that are in equilibrium at point $1$, $2$, $3$ and $5$ has to be identified.

Concept introduction:

Refer to part (a).