Chemistry · THERMODYNAMICS

Given the thermochemical equations: (i) \( \text{C}(\text{graphite}, s) + \text{O}_2(g) \rightarrow \text{CO}_2(g) \); \( \Delta_r H_1^\ominus = -393.5\text{ kJ mol}^{-1} \) (ii) \( \text{CO}(g) + \frac{1}{2}\text{O}_2(g) \rightarrow \text{CO}_2(g) \); \( \Delta_r H_2^\ominus = -283.0\text{ kJ mol}^{-1} \) What is the enthalpy change for the conversion of \( 56\text{ g} \) of \( \text{CO}(g) \) back into graphite and dioxygen according to \( 2\text{CO}(g) \rightarrow 2\text{C}(\text{graphite}, s) + \text{O}_2(g) \)?

1. A
   \( +221.0\text{ kJ} \)
2. B
   \( +110.5\text{ kJ} \)
3. C
   \( -221.0\text{ kJ} \)
4. D
   \( -110.5\text{ kJ} \)