URGENT PLEASE HELP 1) The following balanced chemical equations are for based on the combustions of various fuels. Calculate the heats of combustion for each reaction a. C2H5OH(l) 3O2(g) à 2CO2(g) 3H2O(g) b. 2C4H10(g) 13O2(g) à 8CO2(g) 10H2O(g) c. C3H8(g) 5O2(g) à 3CO2(g) 4H2O(g) 2) Express the heats of combustion from the above reactions as energy changes per mole of fuel combusted. State the reason why energy changes are often expressed per mole of reactant. 3) An Electric Generator burns gasoline to produce electricity. The balanced equation is below: 2C8H18(l) 25O2(g) à 16CO2(g) 18H2O(g) a. Calculate the energy change for the burning of gasoline. b. If the generator produces 2000kJ of electrical energy for every mole of gasoline combusted calculate the efficiency of the generator.