Thermodynamics - Result Question 26
27. If $Q, E$ and $W$ denote respectively the heat added, change in internal energy and the work done in a closed cyclic process, then: [2008]
(a) $W=0$
(b) $Q=W=0$
(c) $E=0$
(d) $Q=0$
Show Answer
Answer:
Correct Answer: 27. (c)
Solution:
- (c) In a cyclic process, the initial state coincides with the final state. Hence, the change in internal energy is zero, as it depends only on the initial and final states.
In case of cyclic process, $u_f=u_i \therefore \Delta u=u_f-u_i=0$ And also $\Delta u \propto \Delta T \therefore \Delta T=0$
