Chemistry · THERMODYNAMICS

Given the standard enthalpies of formation: \( \Delta_f H^\ominus[\text{CO}(g)] = -110.53\text{ kJ mol}^{-1} \) and \( \Delta_f H^\ominus[\text{CO}_2(g)] = -393.51\text{ kJ mol}^{-1} \). The standard enthalpy change (\( \Delta_r H^\ominus \)) for the reaction \( \text{CO}(g) + \frac{1}{2}\text{O}_2(g) \rightarrow \text{CO}_2(g) \) is:

1. -282.98 kJ mol⁻¹
2. -504.04 kJ mol⁻¹
3. +282.98 kJ mol⁻¹
4. -141.49 kJ mol⁻¹