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G (Gibb's free energy) for every solution is said to be less than 0. but isn't it false to say that as in the non ideal solution with positive deviation the gibbs free energy should increase?

G (Gibb's free energy) for every solution is said to be less than 0. but isn't it false to say that as in the non ideal solution with positive deviation the gibbs free energy should increase?

Grade:12

2 Answers

Samarth Rawat
13 Points
4 years ago
It is said that Gibbs energy is negative only for the overall reaction to proceed. If Gibbs energy is positive, the reaction is not feasible i.e it cannot happen in given conditions, so we do not talk about it. Due to positive deviation of a non ideal solution, the Gibbs energy might increase a little bit but it will still remain negative.
Vikas TU
14149 Points
4 years ago
Dear student 
Ideal solution are made by spontaneous process so in spontaneous process 
del G is less than 0.
In non ideal solution spontinityy decreases so del G increases.

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