CBSE Class 11-science Answered
How will you differentiate between physical and chemical equilibria?
Asked by Topperlearning User | 16 Jun, 2016, 05:11: PM
Expert Answer
Physical equilibria do not involve changes to the chemical properties of the substances involved. For instance, equilibrium between water vapor and liquid water in a partly filled sealed container. It is a physical equilibrium since the water molecules have only changed from liquid to vapor.
Chemical equilibria on the other hand involve changes in the chemical composition of substances. Bond breaking and bond formation is involved. An example would be the dissociation of acetic acid. There is an interchange of particles between ions and molecules whose rate of exchange becomes equal when equilibrium is established.
CH3COOH + H2O 
H3O +1 + CH3COO-1
Answered by | 16 Jun, 2016, 07:11: PM
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