Chapter 2, Problem 71E

Interpretation Introduction

Interpretation:

The heat required to raise the temperature of $\text{25}\text{.0}\text{g}$ of iron $\left(\text{0}\text{.108}\text{cal}/\text{g}\times °\text{C}\right)$ from $\text{25}\text{.0}°\text{C}$ to $\text{50}\text{.0}°\text{C}$ is to be calculated.

Concept introduction:

Heat is present in the molecule as the energy due to motions in the molecule. This heat is expressed in the units of calories $\left(\text{cal}\right)$ or joules $\left(\text{J}\right)$. The specific heat capacity of a molecule is defined as the heat required to increase the temperature of the substance by $1°\text{C}$. The formula used to calculate the heat gained or lost by the substance is given below as,

$q=mc\Delta T$