Determine the heat of reaction (δhrxn) for the reduction of acetaldehyde (ch3cho) to ethanol (c2h5oh) by using heat of formation data:

The enthalpy of the reaction is coming out to be -111.6 kJ.

Explanation:

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as

The equation used to calculate enthalpy change is of a reaction is:

The chemical equation for the reduction of acetaldehyde to ethanol follows:

The equation for the enthalpy change of the above reaction is:

We are given:

Putting values in above equation, we get:

Hence, the enthalpy of the reaction is coming out to be -111.6 kJ.