Question

Nitrogen is a colourless, odourless, and tasteless gas, which constitutes 78.01% by volume of the Earth’s atmosphere. At equilibrium, the concentration of [N2] = 0.0400 mol/L, of [O2] = 0.0933 mol/L and of [N2O] = 0.0400 mol/L.
2N2(g) + O2(g) Û 2N2O(g)

The value of equilibrium constant Keq, for the above reaction, is _______.

Answer 1

Keq = [N2O]^2 / ([N2]^2 [O2]) = (0.0400)^2 / ((0.0400)^2·0.0933) = 1 / 0.0933 = 10.72 ≈ 10.7 (unitless).