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Explain chemical equilibrium and free energy change. |
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Answer» Solution :The value of `K_c` GIVES the proportion of PRODUCT and reactant at equilibrium, but the value `K_c` does not change with rate of reaction. The value of `K_c` can.t explain the time when the equilibrium is attain, it can be explain by thermodynamics. By use of Gibbs force energy spontaneity of reaction can be PREDICTED. (i) `DeltaG` is negative (`DeltaG lt 0`) : `DeltaG` is negative, then the reaction is spontaneous. Reaction PROCEED in forward direction and product will form from reactant equilibrium energy decreases. (ii) `Delta`G is positive (`DeltaG gt 0`) : `DeltaG` is positive, then reaction is considered non-spontaneous. So, forward reaction will not take PLACE, So, product convert in to reactant. (iii) `DeltaG = 0`: If `DeltaG = 0` than the reaction is in equilibrium. The reaction will not be continue in any direction. There will be not much energy left for this process. |
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