Answer to Question #192172 in Chemistry for Jade

Question

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.

Answer 1

Solution:

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)