Chapter 5, Problem 139AP

Interpretation Introduction

Interpretation:

The enthalpy changeis to be calculatedwhen ${\text{SO}}_{\text{2}}$ is removed in the given process.

Concept introduction:

The enthalpy of a reactionthat takes place under standard conditions is known as standard enthalpy of the reaction, that is, under room temperature and pressure ${\text{(27}}^0\text{C}\text{and}1\text{atm)}$.

The standard enthalpy of a reaction is to be determined using the equation given below:

$\Delta H{°}_{\text{rxn}}={\displaystyle \sum n}\Delta H_{\text{f}}^{°}\left(\text{products}\right)-{\displaystyle \sum m}\Delta H_{\text{f}}^{°}\left(\text{reactants}\right)$

Here, the stoichiometric coefficients are represented by m for reactants and n for products, and enthalpy of formation under standard conditions is represented by $\Delta H_{\text{f}}^{°}$.

The standard enthalpy of formation of any element in its standard state, also known as the most stable state, is zero.