What Is the Standard Enthalpy of Formation of Liquid Methanol

Multiple Choice

What is the standard enthalpy of formation of liquid methanol, CH₃OH(l) ? C(graphite) + O₂(g) → CO₂(g) ΔH°_rxn = -393.5 kJ/mol
H₂(g) + ½O₂→ H₂O(l) ΔH°_rxn = -285.8 kJ/mol
CH₃OH(l) + 3/2O₂(g) → CO₂(g) + 2H₂O(l) ΔH°_rxn = -726.4 kJ/mol

A) -1691.5 kJ/mol
B) -238.7 kJ/mol
C) 1691.5 kJ/mol
D) 47.1 kJ/mol
E) -47.1 kJ/mol