Chapter 5, Problem 101AP

Interpretation Introduction

Interpretation:

The enthalpy of formation of ethanol is to be calculated.

Concept introduction:

The standard enthalpy for a reaction is the amount of enthalpy at standard conditions

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

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

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

The value of enthalpy of formation of an element is zero, at its most stable state.