The following diagram represents the endothermic reaction at equilibrium at 25 d

Question

The following diagram represents the endothermic reaction at equilibrium at 25 degree C: heat + A(g) 2B(g) a) The temperature is increased to 50 degree C. Which of the following diagrams would represent the system once the equilibrium is reestablished? b) The temperature is decreased to 15 degree C. Which of the following diagrams would represent the system once equilibrium is reestablished? a) Write the equilibrium constant expression for the reaction: N_2(g) + 3H_2(g) 2NH_3(g) b) Calculate the equilibrium constant if: [N_2] = 0.071 M; [H_2] = 9.2 times 10^-3 M; [NH_3] = 1.8 times 10^-4 M

Explanation / Answer

4)

a)

Forward reaction is endothermic in nature

we are increasing temperature or adding heat here

so, according to Le Chatellier's principle,

equilibrium will move in direction which absorbs heat

hence, forward reaction will be favoured

So, number of B will increase

in figure c, number of B has increased

Answer: figure c

b)

Forward reaction is endothermic in nature

we are decreasing temperature or removing heat here

so, according to Le Chatellier's principle,

equilibrium will move in direction which release heat

hence, backward reaction will be favoured

So, number of B will decrease

in figure b, number of B has decreased

Answer: figure b

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