Question

what do you mean by cyclic process ? prove that the work is done by the system or upon the system is equal to area of cyclic curve​

Answer 1

Explanation:

The process in which the initial and final state is the same is known as a cyclic process. It is a sequence of processes that leave the system in the same state in which it started. Hence, the work done by the system in a cyclic transformation is equal to the heat absorbed by the system.

Answer 2

$cyclic \: process$

The process in which the initial and final state is the same is known as a cyclic process.

$proving$

Isothermal expansion: The system does work W1 which equals the heat Q1 added to the system in the expansion, because the internal energy does not change.

Isochoric process: The work done is W2 = 0. Heat Q2 is removed from the system because the temperature decreases from T1 to T2.

Isothermal compression: The work W3 done by the system is negative, but of smaller magnitude than W1 because the area under the PV curve is less than that in step 1. The internal energy is does not change, so the heat removed is Q3 = W3.

Isochoric process: The reverse of step 2. W4 = 0, while heat Q4 = - Q2 is added to the system.

Cycle Summary

Because W2 and W4 = 0, the net work done is Wnet = W1 + W3

Because Q2 + Q4 =0, the net heat added is Qnet = Q1 + Q3 = Wnet

Net work done

Wnet = nR (T1 - T2) ln ( V2/V1)