See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

     3 2 2 3CuO s 2NH g 3Cu s N g 3H O          o o o f f rH H Products H Reactants        = [3 × ( - 285)] – [3 × (- 155) + 2 × (- 46)] = - 298 kJ Heat liberated 298