Calculate the Delta Hf of the OH- ion given that the Delta Hf (H2O) = -285.8 kJ mol-1.

Answer 1

Calculate Delta hf for

C2H2(g) + O2(g) --> CO2(g) + H2O(g)
SO2 (g) + O2(g) --> SO3(g)
Fe2O3(s) + Al(s)(g) --> Fe(s) + Al2O3 (s)