( 8 marks) A chemist studies the four chemical reactions 1. CH4(g)+2O2(g)CO2(g)+2H2O(l) 2. 4NH3(g)+3O2(g)2N2(g)+6H2O(l) 3. CO2(g)+H2(g)CO(g)+H2O(g) 4. C2H4(g)+3O2(g)2CO2(g)+2H2O(g) With corresponding enthalpy of reactants and products: Arrange the reactions in order of increasing order of H. Explain the theory that allows you to complete this tack