3.1 Consider the following thermochemical reactions and calculate the standard enthalpy for the formation of 1 mole liquid water. [6] C3H6(9) + H2(g) C3H8(9) AnyarH/kJ/mol = -124 12 C3H8(9) + 5/2 O2(g) 3/2 CO2(g) + 2 H2O(1) AcH/kJ/mol =-1110 - 2 C3H6(g) + 9 O2(g) 6 CO2(g) + 6 H2O(1) AcH/kJ/mol = -4116