Chapter 7, Problem 94P

Interpretation Introduction

(a)

Interpretation:

The amount of energy required to heat 150 g of water from $35{}^{\circ }\text{C}$ to $100{}^{\circ }\text{C}$ and vaporize water to steam at $100{}^{\circ }\text{C}$ needs to be determined.

Concept Introduction:

The heat required to raise the temperature of a substance can be calculated as follows:

  $q=mc\Delta T$

Here, m is mass, c is specific heat capacity and $\Delta T$ is change in temperature.

The heat of vaporization is the amount of heat required to convert the substance from liquid to gas.

Interpretation Introduction

(b)

Interpretation:

The amount of energy released to condense 42 g of steam to water at $100{}^{\circ }\text{C}$ , water cooled at $0{}^{\circ }\text{C}$ and frozen to solid at $0{}^{\circ }\text{C}$ needs to be determined.

Concept Introduction:

The heat required to raise the temperature of a substance can be calculated as follows:

  $q=mc\Delta T$

Here, m is mass, c is specific heat capacity and $\Delta T$ is change in temperature.

The heat of fusion is the amount of heat generated to convert the substance from liquid to solid.