What is the enthalpy of formation of hexane (C6H14) given that the enthalpy of combustion of hexane is?

-4163.2 kJ/mol, the enthalpy of formation of carbon dioxide is -393.5 kJ/mol and the enthalpy of formation of water is -28508?

a) +67.1 kJ/mol
b) +198.4 kJ/mol
c)-198.4 kJ/mol
d) -67.1 kJ/mol
Update: Its -285.8
3 answers 3