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# Which of the following is less than zero during adsorption?A. $\Delta G$B. $\Delta S$C. $\Delta H$D. All of these

Last updated date: 19th Sep 2024
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Hint: Adsorption is generally described as a surface phenomenon where particles are attached to the top layer of the material. In the process of adsorption, the molecules, atoms, or ions of all states of matter are in a dissolved state which are attached to the surface.

A. $\Delta G$ is the Gibbs free energy which is negative during adsorption because it is a spontaneous process i.e. in which release of energy takes place so it shows a negative value.
B. $\Delta S$ is the change in entropy where entropy is defined as randomness or disorder of the system as the particles adsorb the randomness of the particles goes on decreasing and the process becomes non-spontaneous in nature and the non-spontaneous process is negative in nature,
C. $\Delta H$ describes the change in enthalpy or basically, this process also describes whether the system absorbs heat or produces heat. In the adsorption process heat is absorbed which describes the reaction as exothermic in nature so we can say that the value is also negative.