Question

Which reaction is endothermic? H2(g) + ½ O2(g) → H2O(g), ΔH = -57.82 kcal ½N2(g) + O2(g) + 8.1 kcal → NO2(g) ½N2(g) + 3/2H2(g) → NH3(g) + 11.0 kcal C(diamond) + O2(g) → CO2, ΔH = -94.50 kcal

Answer 1

it has been a while since gen chem, but if it is + value enodthermic, negative exothermic, are you using hess law, or another equation

Answer 2

not sure...