The enthalpy changes for two reactions are given below. $\text{K}_2\text{CO}_3(s) + 2\text{HCl}(aq) \rightarrow 2\text{KCl}(aq) + \text{H}_2\text{O}(l) + \text{CO}_2(g) \quad \Delta H = -34.0\,\text{kJ mol}^{-1}$ $\text{KHCO}_3(s) + \text{HCl}(aq) \rightarrow \text{KCl}(aq) + \text{H}_2\text{O}(l) + \text{CO}_2(g) \quad \Delta H = +32.8\,\text{kJ mol}^{-1}$ Determine the enthalpy change for the reaction shown below. $2\text{KHCO}_3(s) \rightarrow \text{K}_2\text{CO}_3(s) + \text{H}_2\text{O}(l) + \text{CO}_2(g)$
- A$-31.6\,\text{kJ mol}^{-1}$
- B$1.2\,\text{kJ mol}^{-1}$
- C$66.8\,\text{kJ mol}^{-1}$
- D$99.6\,\text{kJ mol}^{-1}$