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How gibbs free energy pridict the spontaneity of reaction?

How gibbs free energy pridict the spontaneity of reaction?

Grade:12

2 Answers

Arun
25750 Points
5 years ago
Yes , entropy change does determine the spontaenity of a process , but that entropy change implies the change in all universe and that includes the change in surroundings too definitely.

Now on paper, it's good to go till calculating entropy change in the system defined by us ; but i'ts not that simple to find that in the surroundings. 

Gibbs Energy relates the entropy changes in both system and surroundings by using the fact that all the heat is transferred between these two.Hence the paperwork is compressed.

That's why we use Gibbs Energy for determining the spontaenity.
REENU SIVADARSHINI.M
118 Points
5 years ago
THE GIBBS FREE ENERGY WHICH IS  A COMBINATION OF  ENTHALPY AND ENTROPY[G=H-TS] WHERE  H IS ENTHALPY AND S IS ENTROPY
 IT SHOULD BE NEGATIVE FOR THE REACTION TO BE SPONTANEOUS

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