Answer to Question #137726 in General Chemistry for Gage Brock

Question

What is the change in heat when 4 moles of NO reacts according to the following equation?

2NO(g) + O2(g) → 2NO2(g) ∆H = - 114.6 kJ

Answer 1

The given equation represents the heat change for 2 moles of NO that react (the coefficient before NO is 2). Therefore, for 4 moles of NO $\Delta{H}=-114.6\times2=-229.2kJ$

Answer: -229.2 kJ