Question

A ball rolls down the hill. A chemical reaction takes place producing heat and an explosion. These are examples of?

• A. Unnatural processes
• B. Irreversible processes
• C. Reversible processes
• D. Simple processes

Answer 1

Answer: (B)

Irreversible processes

A ball rolling down a hill is an energetically favored irreversible process because you cannot repeat the process in reverse without putting some work in. The ball at the bottom of the hill is in a lower energy state and it will stay there until acted upon by another object. It is a spontaneous process.

Hence, option $B$ is correct.