I have this question regarding Hess law but I haven't been able to wrap my head around it, hopefully someone can enlighten me on how to go about it
An investigation was performed to test Hess's law. A measured mass of cycloheptane was completely burned in a bomb calorimeter. The following data was generated.
7C(s) + 7H2(g) --> C7H14(l) Hf = -156.6 kJ/mol
C(s) + O2(g) --> CO2(g) Hf = - 393.5 kJ/mol
H2(g) ½ O2(g) --> H2O(l) Hf = - 285.8 kJ/mol
Using the information from the investigation, what is the predicted molar enthalpy of combustion of cycloheptane?