Chapter 5, Problem 119AP

Interpretation Introduction

Interpretation:

The enthalpy change for the reaction on molar basis is to be determined.

Concept introduction:

Heat absorbed or released in the reaction is given by the expression as follows:

$q=sm\Delta T$

Here, $s$ is specific heat, $m$ is mass of sample and $\Delta T$ is change in temperature.

Specific heat is the heat required to increase the temperature of $1\text{ g}$ of a substance by $1^{\circ }\text{C}$. Its S. I. unit is $\left(\text{J}/\text{g}{\text{.}}^{\text{o}}\text{C}\right)$.

Heat absorbed or released in the reaction is calculated by the expression as follows:

$q=C\Delta T$

Here, $C$ is the heat capacity of a body and $\Delta T$ is change in temperature.

Heat capacity is defined as the heat required to increase the temperature of a body by $1^{\circ }\text{C}$. Its S. I. unit is $\left(\text{J}{/}^{\text{o}}\text{C}\right)$.

Concentration (molarity) of a solution is given by the expression as follows:

$M=\frac{m}{V}$

Here, $m$ is number of moles and $V$ is volume of the solution.