Chapter 7, Problem 99IAE

Interpretation Introduction

Interpretation:

The number of metric tons of the coal required to be burned to release $2.15\times {10}^9\mathrm{kJ}$ of heat needs to be determined.

Concept introduction:

The heat required or released to change the temperature of a substance can be calculated using the following relation:

$q=m\times S\times \Delta T$

Here, m is mass, S is specific heat capacity of the substance and $\Delta T$ is change in temperature.

The amount of heat required to increase the temperature of 1 lb of water by1°F is calculated in Btu or British thermal unit. The specific heat capacity of water is assumed to be independent of the temperature.