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DeltaG is a thermodynamic prop erty the ...

`DeltaG` is a thermodynamic prop erty the decrease in which value is the measure of useful work done at constant temperature and pressure:
`DeltaG_("system") lt 0` (spon tan eous) ,
`DeltaG_("system")=0` (equilibrium),
`DeltaG_("system") gt 0` (non- spon tan eous),
Free energy is related to the equilibrium constant, as `DeltaG^(@)=-2.0303 RT log_(10) K_(c)`
A reaction has poaitive values of `DeltaH` and `DeltaS` from this you can deduce that the reaction:

A

Must be spotaneous at any temperature

B

Cannot be spontaneous at any temperature

C

Will be spontaneous only at low temperature

D

Will be spontaneous only at high temperature

Text Solution

Verified by Experts

The correct Answer is:
D
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DeltaG is a thermodynamic prop erty the decrease in which value is the measure of useful work done at constant temperature and pressure: DeltaG_("system") lt 0 (spon tan eous) , DeltaG_("system")=0 (equilibrium), DeltaG_("system") gt 0 (non- spon tan eous), Free energy is related to the equilibrium constant, as DeltaG^(@)=-2.0303 RT log_(10) K_(c) For a reaction to be spontaneous at all temperatures:

How is DeltaG^(@) related to equilibrium constant?

Gibbs energy change DeltaG is related to equilibrium constant 'K'. As

The standard Gibb's free energy change, DeltaG^(@) is related to equilibrium constant, kp as