Question

In a chemical reaction,4 mol of nitrogen monoxide(NO) and 2.5mol of Oxygen(O2) are being mixed togethere in a container with a volume of 1L to produce Nitrogen dioxide (NO2).If the Kc(Equilibrium constant) for this reaction in 0.001.
If the enthalpy of the above reaction is +49kJ/mol. Predict the outcome of the reaction

Answer 1

To predict the outcome of the reaction, we need to compare the reaction quotient (Q) with the equilibrium constant (Kc).

The balanced chemical equation for the reaction is:

2NO (g) + O2 (g) -> 2NO2 (g)

The reaction quotient (Q) is calculated by taking the products raised to their coefficients and dividing by the reactants raised to their coefficients:

Q = [NO2]^2 / [NO]^2 [O2]

Given that the initial moles of NO and O2 are 4 mol and 2.5 mol respectively, the initial moles of NO2 would be 0 mol.

Therefore, Q = (0/4)^2 / (4/1)^2 (2.5/1) = 0

Since Q < Kc, the reaction will proceed in the forward direction to reach equilibrium. Therefore, the reaction will proceed to form more NO2 until it reaches equilibrium.