Chapter 5.6, Problem 1PPA

Interpretation Introduction

Interpretation:

The energy content of grape-nuts cereal is to be calculated.

Concept introduction:

The bomb calorimeter is a constant volume calorimeter, which is used to measure the heat of combustion.

The relation between the heat change of the calorimeter and the heat change of the reaction is given as follows:

$q_{cal}=-q_{rxn}$

The heat change of the reaction in the calorimeteris calculated as follows:

$q_{rxn}=-C_{cal}\Delta T$

Here, $q_{rxn}$ is the heat change of the reaction, $C_{cal}$ is the heat capacity of the calorimeter, and $\Delta T$ is the temperature change of the substance.

The temperature change of the reaction is calculated as follows:

$\Delta T=T_{final}-T_{initial}$

The energy content of a substance is calculated by dividing the heat released incombustion of the substance by its mass.