Use Hess’s law to determine the Delta H for the combustion of liquid methanol

Answer 1

You didn't provide the reactions needed, nor did you provide any ∆H values. Are you looking for something like...

CH3OH (l) + O2 (g) ----->

C (s, graphite) + 2 H2 (g) + 1⁄2 O2(g) --> CH3OH (l) ... ΔHf =-238.7 kJ

C (s, graphite) + O2 (g) ----> CO2(g) ... ΔHf = -393.5 kJ

H2 (g) + 1⁄2 O2 (g) --> H2O (l) ... ΔHf = -285.8 kJ

I'm not going to spend the time running through the solution if I'm not sure this is the problem you are being asked to solve. You MUST provide more information.