The amount of heat evolved when One mole of a
gas is absorbed on the surface of an adsorbent is
called
(a) Molar Free energy of adsorption
(b) Molar enthalpy of adsorption
(c) Molar entropy of adsorption
(d) Isoteric enthalpy of adsorption
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Answer:
Molar Free enargy of adsorption
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Option (b) The amount of heat evolved when one mole of a gas is absorbed on the surface of an adsorbent is called Molar enthalpy of adsorption.
Explanation:
- The amount of heat evolved when one mole of the gas is adsorbed on an adsorbent is called the molar enthalpy of adsorption.
- Adsorption is an exothermic process and enthalpy change is always negative.
- It is a surface phenomenon.
- here in adsorption, the adsorbate molecules are adsorbed on the surface where the freedom of molecules will be restricted and this results in the decrease in the entropy.
- It is a spontaneous process that takes place at constant pressure and temperature.
- Gibbs's free energy is decreased during the process.
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