enthalpies of formation and delta H?

Question

C5H12(l) + 8 O2(g) --> 5CO2 (g) +6 H2O (g)

calculate delta Hrxn for this reaction using standard enthalpies of formatio (The standard enthalpy of formation of liquid pentane is -143.8kJ/mol)

Answer 1

Please get the standard enthalpy of formation of CO2(g), H2O(g) as well, and I believe that for O2(g) is zero. Apply Hess's law to get the result. Sorry, I do not remember all these standard enthalpies of formation.