The equilibrium constant for a reaction A-B- C-D is 1- 10-2 at 298K and is 2 at 273 K- The chemical process resulting in the formation of C and D is-

Byju's Answer

Standard XII

Chemistry

Vant Hoff's Equation and Effect of Temperature on Equilibrium Constant

The equilibri...

Question

The equilibrium constant for a reaction $A + B ⇋ C + D$ is $1 \times 10^{- 2}$ at 298K and is 2 at 273 K. The chemical process resulting in the formation of C and D is:

Exothermic

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Endothermic

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Unpredictable

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There is no relationship

Δ H

and K.

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Solution

The correct option is A Exothermic
With increase in temperature from 273 K to 298 K, the value of the equilibrium constant decreases from 2 to $1 \times 10^{- 2}$ . Thus as the temperature increases, the equilibrium shifts to left. This is possible for an exothermic reaction.
Thus the process resulting in the formation of C and D is an exothermic reaction.

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