Based on relative bond strengths, classify these reactions as endothermic (energy absorbed) or exothermic (energy released):
Endothermic
B2+C2-->2BC
A+BC-->AB+C
Exothermic
AB+C-->AC+B
A2+C2-->2AC
A2+B2-->2AB
Endothermic
B2+C2-->2BC
A+BC-->AB+C
Exothermic
AB+C-->AC+B
A2+C2-->2AC
A2+B2-->2AB