Question

When are the products of an equilibrium reaction favored?

A. When the reaction is endothermic.
B. When the equilibrium constant is large.
C. When the macroscopic properties are constant.
D. When the activation energy of the forward reaction is high.
E. When the reverse reaction is favored.

Answer 1

Answer : Option B) When the equilibrium constant is large.

Explanation : The expression for an equilibrium constant is expressed as the product of the concentrations of the reaction products in the numerator and the product of the concentrations of the reactants in the denominator.

Each of the concentrations are raised to the power of their respective stoichiometric coefficients in the reaction.

When the equilibrium is large the products are favored over the reactants, as concentration of products are directly proportional to the equilibrium constant.

The expression of equilibrium constant is given by

K =

where K - equilibrium constant;

a - co-efficient of product; and

b - co-efficient of reactant.

Answer 2

Answer: option B. when the equilibrium constant is large.

Remember the equilibrium constant is the product of the concentrations of the products (each raised to the correspondant estoichiometric coefficient) divided by th product of the concentrations of the reactans (each raised to the correspondant coefficient).

So, the larger the concentration of the products the larger the equailibrium constant, that drives to conclude that a large equilibrium constant favors the yield of the products (forward reaction).