Question

Propane (C3H8) burns according to the following balanced equation: C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g). Calculate ΔH∘rxn for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of gaseous propane is -103.9 kJ/mol.)

A) -195.5 kJ
B) -259.3 kJ
C) -311.4 kJ
D) -415.7 kJ

Answer 1

To calculate the enthalpy change for the combustion of propane using standard enthalpies of formation, we need to know the standard enthalpies of formation of gaseous propane, carbon dioxide, and water. Given the enthalpy of the formation of gaseous propane, we can determine the enthalpy change for the combustion reaction using the balanced equation.

Step-by-step explanation:

The enthalpy change for a reaction can be calculated using the standard enthalpies of the formation of the reactants and products. In this case, we need the standard enthalpies of the formation of gaseous propane (C3H8), carbon dioxide (CO2), and water (H2O).

Since the enthalpy of formation of gaseous propane is given as -103.9 kJ/mol, we can calculate the enthalpy change for the combustion of propane using the balanced equation and the standard enthalpies of formation.