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Gibbs Helmholtz equation relates the enthalpy, entropy and free energy change of the process at constant pressure and temperature as `DeltaG=DeltaH-TDeltaS " (at constant P, T)"` In General the magnitude of `DeltaH` does not change much with the change in temperature but the terms `TDeltaS` changes appreciably. Hence in some process spontaneity is very much dependent on temperature and such processes are generally known as entropy driven process. Fro the reaction at 298 K, `A_(2)B_(4)rarr2AB_(2)` `DeltaH=2" kJ"` and `DeltaS` = 20 J/K at constant P and T, the reaction will beA. spontaneous and entropy drivenB. spontaneous and enthalpy drivenC. non-spontaneousD. at equilibrium |
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Answer» Correct Answer - A `(DeltaG)_(PT)=2000-(20xx298)` `=-3960 " J"//"mol"` |
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