Using values from Appendix C , calculate the value of ∆H° for each of the following reactions:a. CaO (s) + 2HCl (g) ---> CaCl2 (s) + H2O (g)b. 4FeO (s) + O2 (g) --> 2Fe2O3 (g)c. 2CuO (s) + NO (g) --> Cu2O (s) + NO2 (g)d. 4NH3 (g) + O2 (g) --> 2N2H4 (g) + 2H2O (l)