Spontaneous and non spontaneous process

What is spontaneous process in chemistry?

The process which proceeds by themselves in bringing the system closer to the equilibrium are called spontaneous process. They are also called positive or neutral process. It is reversible.

What is non spontaneous process in chemistry?

The process which cannot proceed by themselves or by thermodynamics are called non spontaneous process. That is search process cannot proceed without any internal exam and bring the system away from the equilibrium. They are called negative or unnatural process.