Hydrogen may be obtained by reacting methane with steam. $\text{CH}_4 + 2\text{H}_2\text{O} \rightarrow \text{CO}_2 + 4\text{H}_2$ With the bond energies shown in the table, what is the enthalpy change of reaction, $\Delta H$?
- A$-620\,\text{kJ mol}^{-1}$
- B$-238\,\text{kJ mol}^{-1}$
- C$+238\,\text{kJ mol}^{-1}$
- D$+620\,\text{kJ mol}^{-1}$