Question

In the chemical reaction 2NO(g) + 2H2(g) ➡ N2(g) + 2H2O(g), how would adding more NO(g) affect the rate of the reaction?

a) The rate of the reaction will increase.
b) The rate of the reaction will decrease.
c) The rate of the reaction will remain constant.
d) The rate of the reaction cannot be predicted based on the addition of NO(g).

Answer 1

Adding more NO(g) to the chemical reaction 2NO(g) + 2H₂(g) → N₂(g) + 2H₂O(g) will increase the reaction rate, as the reaction is second order with respect to NO and hence rate is proportional to the square of NO concentration.

Step-by-step explanation:

In the chemical reaction 2NO(g) + 2H₂(g) → N₂(g) + 2H₂O(g), adding more NO(g) would affect the rate of the reaction. Since the rate law based on the mechanism is rate = k[NO]²[H₂], and the overall order with respect to NO is 2, increasing the concentration of NO(g) will significantly increase the rate of the reaction. This is because when you double the concentration of NO, the rate will increase by a factor of four, as observed in experimental data.