Calculate the standard enthalpy of combustion of ethanol at 298 K from standard enthalpy of formation data. A) -957.0 kJ.mol^-¹ B) -1367 kJ.mol^-¹ C) -687.5 kJ.mol^-¹ D) -1922 kJ.mol^-¹ E) -401.7 kJ.mol^-¹

Question

Quizplus · Accepted Answer

The standard enthalpy of combustion of ethanol can be calculated using the standard enthalpy of formation values for the reactants and products in the combustion reaction: C2H5OH + 3O2 → 2CO2 + 3H2O. The calculation involves using the formula: ΔH°combustion = ΣΔH°f(products) - ΣΔH°f(reactants). The correct value is -1367 kJ/mol.

Calculate the Standard Enthalpy of Combustion of Ethanol at 298