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The equilibrium constant of a reaction i...

The equilibrium constant of a reaction is `2xx10^(-3)` at `25^@C` and `2xx10^(-2)` at `50^@C`. Is the reaction exothermic on endothermic? Explain.

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At `25^@C` the equilibrium constant is `2xx10^(-3)`, but at `50^@C` the equilibrium constant becomes `2xx10^(-2)`. The equilibrium constant is increased with the rise of temperature. Consequently the forword reaction must be endothermic.
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