How much heat is absorbed/released when 40.00 g of NH₃(g)reacts in the presence of excess O₂(g)to produce NO(g)and H₂O(l)according to the following chemical equation? 4NH₃(g)+ 5O₂(g)→ 4NO(g)+ 6H₂O(l)Δ_rH° = 1168 kJ

Question

Quizplus · Accepted Answer

The reaction releases 1168 kJ for 4 moles of NH₃. The molar mass of NH₃ is 17.03 g/mol, so 40.00 g corresponds to 2.35 moles. The heat released is (1168 kJ/4 moles) * 2.35 moles = 685.8 kJ, indicating heat is absorbed.

How Much Heat Is Absorbed/released When 40