Question

Which of the following are correct about physisorption?

1) Decrease in entropy of system
2) Decrease in enthalpy
3) The value of TdS is positive
4) It is reversible in nature

• A. 1, 2 & 3
• B. 2, 3 & 4
• C. 1, 2 & 3
• D. 1, 2 & 4

Answer 1

The correct option is D

1, 2 & 4

Gas adsorbed on solid surface leads to a decrease in randomness of molecules, adsorption is exothermic, spontaneous ($\Delta$G = - ve) and reversible in nature