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 be
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 be
`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 be
A
spontaneous and entropy driven
B
spontaneous and enthalpy driven
C
non-spontaneous
D
at equilibrium
Text Solution
Verified by Experts
The correct Answer is:
A
`(DeltaG)_(PT)=2000-(20xx298)`
`=-3960 " J"//"mol"`
`=-3960 " J"//"mol"`
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