3) 2 MgO(s) --> 2 Mg (s) + O2(g)
H = +72.3 kJ
a.Endothermic or exothermic? _______________________
b.Heat is released or absorbed?_______________________
c.Temperature would go up or down? ________________
d.Rewrite the equation putting the heat in as a reactant or product.
a) Endothermic reaction (since ΔH > 0)
b) Heat is absorbed (for endothermic reactions).
c) Temperature would down (for endothermic reactions).
d) 2MgO(s) + 72.3 kJ → 2Mg(s) + O2(g)