Physics, asked by ananyaaa6891, 1 year ago

Explain the relation between gibbs free energy and equilibrium constant.

Answers

Answered by sahilchoudhury
10

A spontaneous reaction has a negative delta G and a large K value. A non-spontaneous reaction has a positive delta G and a small K value. When delta G is equal to zero and K is around one, the reaction is at equilibrium. ... This relationship allows us to relate the standard free energy change to the equilibrium constant.

Answered by Shanayasharma2907
13

Gibbs free energy tells us whether a reaction is spontaneous one or not.

The change of Gibbs energy of a reaction is given by,

∆G°=∆H°-T∆S°

Where ∆G is the change in free energy, ∆H is the change in enthalpy, T is temperature in Kelvin and ∆S is change in entropy.

This equation can be rewritten in terms of free energy and reaction quotient Q.  

∆G =∆G°+RT InQ

The equilibrium constant K also tells about the reaction is spontaneous are not.

At equilibrium Q=k and ∆G=0.

Then,

∆G°=-RT InK

Similar questions