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From the values of ?H and ?S, predict which of the following reactions would be spontaneous...

From the values of ?H and ?S, predict which of the following reactions would be spontaneous at 25

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Answer #1

The basic condition for the spontaneous reaction is the Gibbs free energy

        G = dH - Tds

        Putting the value of H enthalpy , T temprature and s entropy.

        For Ist reaction

              G = 105.5 - 298( 30) = -8824.5KJ

      Here for ist case , the sign of Gibbs free energy is negative so the reaction will be spontaneous and will be in forward direction.

2)           G = 1.8 - 298(-113) = 33675KJ

                    As the sign of free energy is positive so the reaction will be spontaneous and in reverse direction.

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