Chemistry · THERMODYNAMICS

Given the standard molar enthalpies of formation at 298 K: \( \Delta_f H^\ominus[\text{CH}_4(g)] = -74.81\text{ kJ mol}^{-1} \), \( \Delta_f H^\ominus[\text{CO}_2(g)] = -393.51\text{ kJ mol}^{-1} \), and \( \Delta_f H^\ominus[\text{H}_2\text{O}(l)] = -285.83\text{ kJ mol}^{-1} \). The standard enthalpy of combustion of methane, \( \text{CH}_4(g) + 2\text{O}_2(g) \rightarrow \text{CO}_2(g) + 2\text{H}_2\text{O}(l) \), is:

1. -604.53 kJ mol⁻¹
2. -890.36 kJ mol⁻¹
3. -965.17 kJ mol⁻¹
4. -815.55 kJ mol⁻¹