Question

Rewrite each equation below with the delta H value included with either the reactants or the products and identify the reaction as endothermic or exothermic.

A) H2(g) + O2 (g) -> H2O (l);
DeltaH^0 = -285.83

B)2Mg(s) +O2(g) ->2MgO(s); deltaH^0 =-1200kJ

Answer 1

A) 2H₂(g) + O₂(g) → 2H₂O(l) + 285.83 kJ
Exothermic

B) 2Mg + O₂ → 2MgO + 1200kJ
Exothermic