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  4. Adsorption is accompanied by

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Q. Adsorption is accompanied by

Surface Chemistry

Solution:

As adsorption is spontaneous, ΔG for the process is -ve. Adsorption is accompanied by decrease in randomness, therefore ΔS and TΔS for the process is also negative. As ΔS for the process is -ve and the process is spontaneous, ΔH for the process has to be -ve, i.e., enthalpy of the system decreases.