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Justify the following statements : (a)Reactions with DeltaG^(@)lt 0alwayshave an equilibrium constantgreater than 1. (b)Many thermodynamically enthalpyfeasible reactions do not occur under ordinary conditions. (c ) At low temperature, enthalpychange dominates the DeltaGexpression and at high temperatures, it is entropy whch dominatest the value of DeltaG. |
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Answer» SOLUTION :(a)Aready discussedalready (b) Under ordinaryconditions, the average energy of the reactants MAY be less than THRESHOLD energy.They requiresome activation energy to initiate the reaction. (c )`DeltaG = DELTAH - T DELTAS`. At low temperature, `TDeltaS` is small. Hence,`DeltaH ` dominates. At high temperatures,`T DeltaS`is large, ie., `DeltaS` dominates the value of`DeltaG`. |
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