consider the following reaction:

Question

C3H8 (g)+ 5O2 (g)--> 3CO2 (g)+ 4H20 (g)
Delta H = -2440kJ
The heat of formation of CO2 is -390 kJ/mol and the heat of formation of H2O is -240 kJ/mol. What is the heat of formation of propane?

Answer 1

Using Hess' Law....

3*(-390)+4(-240)-Hf=-2440

solve for Hf(propane).