Question

When a gas is adsorbed by a solid sample then both the enthalpy and entropy of the system decrease explain?

Answer 1

Answer:

1. Enthalpy is a thermodynamic parameter involving the internal energy change of the system.

During adsorption, gas molecules are attached to the solid surface. Since this is a surface phenomenon, there is release in surface energy.

Hence the enthalpy decreases.

2. Entropy is defined as the randomness/ chaos of the molecules in a system.

During adsorption, the gas molecules are restricted to move after being attached to the solid surface.

Hence the randomness decrease and thereby decreasing the entropy.

Answer 2

AnSwEr:-

$\longrightarrow$Entropy is defined as the randomness/ chaos of the molecules in a system. During adsorption, the gas molecules are restricted to move after being attached to the solid surface. Hence the randomness decrease and thereby decreasing the entropy.