Question

In a cyclic process, if \( \Delta U \) = internal energy, \( W \) = work done, \( Q \) = Heat supplied, then:

• A. \( \Delta U = Q \)
• B. Q = 0
• C. W = 0
• D. W = Q

Hint:

In cyclic processes, the net work done by the system is equal to the heat supplied over the entire cycle.

Answer 1

The Correct Option is D

Step 1: In a cyclic process, the system returns to its initial state, which implies that the change in internal energy is zero: \[ \Delta U = 0. \] Step 2: According to the First Law of Thermodynamics: \[ Q = \Delta U + W. \] Since \( \Delta U = 0 \), this simplifies to: \[ Q = W. \]