The use of Hess' Law for calculation reaction enthalpies does not require a specific pathway between reactants and products. O True O False If the enthalpy change for the complete combustion of methane is -850.4 kJ. calculate the standard enthalpy of formation for methane in kJ/mol, given that the standard enthalpies of formation for carbon dioxide and water are -393.5 and -285.8 kJ/mol, respectively. O a. +171.4 O b.-74.7 O c.-114.1 O d. +114.4 In a calorimetry experiment, a 1.03g sample of naphthalene (C10H g; heat of combustion 5150 kJ/mol) was burned and the temperature went up 3.86 C. Then a 0.496 g fuel sample was burned and the temperature rose 2.13 C What is the energy density of the fuel, in kJ/g? O a. 46.1 O b.35.2 O c. 83.6 O d. 21.7