Chapter 11, Problem 11.47SP

Interpretation Introduction

Interpretation:

The amount of heat released to condense $15.\text{3 g}$ of steam is to be calculated.

Concept introduction:

The formula to calculate the number of moles is as follows:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

The formula to calculate amount of heat from temperature change is as follows:

$q=\left(C_{\text{m}}\right)\left(\text{number of moles}\right)\left(\Delta T\right)$

Where,

• $q$ is amount of heat.
• $C_{\text{m}}$ is the specific heat of compound.
• $\Delta T$ is the temperature change.

The formula to calculate amount of heat from heat of vaporization is as follows:

$q=\left(\text{number of moles}\right)\left(\Delta H_{\text{vap}}\right)$

Where,

• $q$ is amount of heat.
• $\Delta H_{\text{vap}}$ is the heat of vaporization.

The conversion factor to convert $\text{J}$ into $\text{kJ}$ as follows:

$1\text{kJ}=\text{1000 J}$