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Statement-1: Decrease of free energy dur...

Statement-1: Decrease of free energy during the process under constant temperature and pressure provides a measure of its spontaneity.
Statement -2: A spontaneous change must have +ve sign of `DeltaS_("system").`

A

Statement-1 is true, Statement-2, is true, Statement -2 is a correct explanation for statement-1

B

Statement-1 is true, Statement-2, is true, Statement -2 is not a correct explanation for statement-1

C

Statement-1 is true, Statement-2 is false

D

Statement-1 is false, Statement-2 is true

Text Solution

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The correct Answer is:
C
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The changes in gibbs energy (Delta G) of a system for a process at constant temperature and pressure is

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The change in Gibbs free energy of the system alone provides a criterion for the spontaneity of a process at constant temperature and pressure. A change in the free energy of a system at constant temperature and pressure will be : DeltaG_("system")=DeltaH_("system")-T DeltaS_(system") The free energy for a reaction having DeltaH=31400 cal, DeltaS=32 cal L^(-1) mol^(-1) at 1000^(@)C

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