Question

In an irreversible process, system goes from an initial state A to a final state B. Which of the following is true?

• A. Work done from state A to state B is zero.
• B. Heat required from state A to state B is non-zero.
• C. Heat required from state A to state B and back to state A is non-zero.
• D. Heat required from state A to state B and back to state A may be non-zero.

Answer 1

The correct option is D Heat required from state A to state B and back to state A may be non-zero.

An irreversible process increases the entropy of the universe. Because entropy is a state function, the change in entropy of the system is the same, whether the process is reversible or irreversible.In an irreversible process, system goes from an initial state A to a final state B heat required from state A to state B and back to state A may be non-zero