Consider the system 4NH3(g) + 3O2(g) = 2N2(g) + 6H2O(g) + heat...?

Question

Consider the system 4NH3(g) + 3O2(g) = 2N2(g) + 6H2O(g) + heat
How will the amount of N2 be affected by decreasing the temperature?

Answer 1

Decreasing the temperature is effectively removing some of the "heat" that is a product. The equilibrium will shift to replace some of the product you removed, and so will produce more of all of the products. Thus, the concentration of N2 will increase.