3 Find the AH° for the reaction below, given the following reactions and subsequent AH values: N2H (1) + CH, O(1) CH2O(g) + N2(g) + 3H2(g) 2NH3(g) N H (1) + H2(g) AH = 47.5 kJ 2NH, (g) N2(g) + 3H2(g) AH=57.5 kJ CH2O(g) + H2(g) CH, O() AH = 81.2kJ ​