When happens to entropy of a spontaneous process?

What 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 ?

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.

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

When Delta H and TDeltaS both are negative , then for spontaneous process which option is true?

In which direction does a spontaneous process proceed ?

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