The following reactions have the indicated equilibrium constants at a particular temperature: n2(g) + o2(g) ⇌ 2no(g) kc = 4.3 × 10−25 2no(g) + o2(g) ⇌ 2no2(g) kc = 6.4 × 109 determine the values of the equilibrium constants for the following equations at the same temperature: (a) 4no(g) ⇌ n2(g) + 2no2(g)

Explanation:

We have the reactions:

A:

B:

Our target reaction is:

We have as a reactive in the target reaction and   is present in A reaction but in the products side. So we have to flip reaction A.

A:

Then if we add reactions A and B we can obtain the target reaction, so:

A:

B:

For the final Kc value, we have to keep in mind that when we have to add chemical reactions the total Kc value would be the multiplication of the Kc values in the previous reactions.