Question

What is the equilibrium constant (Kc) expression for the following chemical equation: 2NO2(g) ⇌ N2O4(g)? Given the concentration of NO2 to be 0.025 mol/L and the concentration of N2O4 to be 0.0105 mol/L at equilibrium, calculate the value of Kc.

Answer 1

The equilibrium constant  Kc  expression for the given chemical equation 2NO2 g   N2O4 g  can be written as:Kc = [N2O4] / [NO2]^2Given the concentration of NO2 to be 0.025 mol/L and the concentration of N2O4 to be 0.0105 mol/L at equilibrium, we can now calculate the value of Kc:Kc =  0.0105  /  0.025 ^2Kc = 0.0105 / 0.000625Kc  16.8Therefore, the value of Kc for the given reaction is approximately 16.8.