Question

For the reaction A + B ⇄ 3C at 25 °C, a 3 litre vessel contains 1, 2, 4 mole of A, B and C respectively. Predict the direction of reaction ifa. Kc for the reaction is 10b. Kc for the reaction is 15c. Kc for the reaction is 10.66

Answer 1

Sublimation Definition. Sublimation is the transition from the solid phase to the gas phase without passing through an intermediate liquid phase. This endothermic phase transition occurs at temperatures and pressures below the triple point.

Answer 2

Answer: a) towards reactant side

b) towards product side

c) at equilibrium

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_c$

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

For the given chemical reaction:

$A+B\rightleftharpoons 3C$

The expression for $Q_c$ is written as:

$Q_c=\frac{[C]^3}{[A]^1[B]^1}$

$Q_c=\frac{[(\frac{4}{3})]^3}{[(\frac{1}{3})]^1[(\frac{2}{3})]^1}$

$Q_c=10.66$

a)  $K_c$ = 10

Thus as $K_{eq}<Q$, the reaction will shift towards the right i.e. towards the reactant side.

b) $K_c$ = 15

Thus as $K_{eq}>Q$, the reaction will shift towards the right i.e. towards the product side.

c) $K_c$ = 10.66

Thus as $K_{eq}=Q$, the reaction will be in equilibrium.