Hess's Law says that the overall enthalpy change accompanying a chemical reaction is independent of the route taken in going from reactants to products (provided that in each case the same initial and final states of temperature and pressure apply to the reactants and products).
Click each of the following in turn to build the enthalpy cycle:
Write a chemical equation for the reaction for which DH is to be calculated.
Completely burn 6 moles of C(s) and 7 moles of H2(g).
Combine (react) 6 moles of
CO2(g) and 7 moles of H2O(l) to form 1 mole of C6H14(l).
Reverse of the enthalpy of combustion of hexane.
Complete the calculation.