Chemistry

Problem

The table lists estimated energies for three gas-phase reactions carried out at 298 K.

Reaction	Energy required to break reactant bonds (kJ)	Energy released when product bonds form (kJ)
X	1 550	2 100
Y	1 200	800
Z	1 800	1 700

Based on these data, which ordering ranks the reactions from most exothermic to most endothermic? a) Z > X > Y b) X > Z > Y c) Y > Z > X d) Y > X > Z