Final answer:
The equilibrium constant expression for the reaction 2NO(g) + O₂(g) ⇌ 2NO₂(g) is Kc = [NO₂]2 / ([NO]2 × [O₂]), which considers the stoichiometry of the balanced chemical equation.
Step-by-step explanation:
Equilibrium Constant Expression for the Given Chemical Reaction:
To identify the correct equilibrium constant expression for the equation 2NO(g) + O₂(g) ⇌ 2NO₂(g), we need to know the formula for the equilibrium constant expression, which is given as:
Kc = [Products]stoichiometric coefficients / [Reactants]stoichiometric coefficients For the reaction presented, the equilibrium constant expression is:
Kc = [NO₂]2 / ([NO]2 × [O₂])
This expression takes into account the stoichiometry of the reaction by raising the concentration of each species to the power of its coefficient in the balanced equation.