Chapter 8, Problem 8.45NP

(a)

Interpretation Introduction

Interpretation:

The phases present when 20 g of water is enclosed in a container of volume 20 L and held at a temperature of 298.15 K and pressure of 23.76 torr, needs to be identified

Concept Introduction:

Matter in general exists in three phases; solid, liquid and gases that are in equilibrium under certain conditions.

Vaporization is a phase transition process in which the liquid and gaseous phases are in equilibrium, fusion reaction is associated with solid liquid equilibrium whereas sublimation involves equilibrium between the solid and gas phases.

(b)

Interpretation Introduction

Interpretation:

The volume at which only the gas phase will be present under the given conditions needs to be calculated

Concept Introduction:

For 'n' moles of an ideal gas the relationship between pressure (P), volume (V), temperature (T) is given by the ideal gas equation:

  $\text{PV = nRT ------(1)}$

Here, R = gas constant

(c)

Interpretation Introduction

Interpretation:

The volume at which only the liquid phase will be present under the given conditions needs to be calculated

Concept Introduction:

Volume is an extensive property as it depends on the mass or the amount of the substance. It is expressed as the ratio of mass and density.

  $\text{Volume = }\frac{\text{Mass}}{\text{Density}}\text{ -------(2)}$