What happens to entropy of a spontaneous process?

When happens to entropy of a spontaneous process?

For a spontaneous process :-

What do you understand by spontaneous and non spontaneous processes ? What are the important features of a spontaneous process ?

What happens to the entropy when a gas undergoes expansion ? Explain.

What do you understand by a spontaneous process ? Give two examples

Adsorption of a gas on the surface of solid is generally accompanied by decrease entropy. Still it is a spontaneous process. Explain.

The total entropy change (DeltaS_("total")) for the system and surrounding of a spontaneous process is given by

Assertion :- In an isolated system the entropy increases due to spontanous process. Reason :- The processes in an isolated system are adiabatic.

Fill in the blanks by putting appropriate choices. During adsorption there is _______ in enthalpy and _______ in the entropy of a system by adsorption is a spontaneous process and thus DeltaG must be ________. Rate of physisorption ________ with increase in pressure.

The adsorption of vapours on a clean surface is a spontaneous process because