11. Given the thermochemical expression for combustion of isooctane (a component of gasoline), 2C8H18(l)+25O2(g)16CO2(g)+18H2O(l);H=10,992kJ write a thermochemical expression for : (a) production of 4.00molCO2 (g). (b) combustion of 100. mol isooctane. (c) combination of 1.00mol isooctane with a stoichiometric quantity of oxygen from air. 12. The enthalpy changes of these reactions can be measured: C2H4(g)+3O2(g)2CO2(g)+2H2O(l)Ho=1411.1kJC2H5OH(l)+3O2(g)2CO2(g)+3H2O(l)H=1367.5kJ Use these values and Hess's law to determine the enthalpy change for the reaction C2H4(g)+H2O(l)C2H5OH(l)