If ‘971 564 51 358 236 123 93' is the second step of an input, which of the following step will be the ‘971 564 358 236 123 51 93’?
Standard enthalpy of combustion of CH4 is −890 kJ mol−1 and standard enthalpy of vaporisation of water is 40.5 kJ mol−1. Calculate the enthalpy change for the reaction : CH4(g)+2O2(g)→CO2(g)+2H2O(g)