In a reaction of a potential new fuel, it is found that when 2.81 moles of the fuel combusts, 1,612 kJ of energy is released. What is the delta H rxn...

In a reaction of a potential new fuel, it is found that when 2.81 moles of the fuel combusts, 1,612 kJ of energy is released.  What is the delta Hrxn for the combustion of the fuel in units of kJ/mol.  (If it is negative, include the negative sign.  If it is positive, include nothing)