Rajdeep
Last Activity: 5 Years ago
HELLO THERE!
From the Graph, it is clear that the system is first expanding (A to B).
Then,the system is compressing (B to C)
Next, the system is again expanding (C to D)
After that, the system is compressing (D to A).
Note: The paths in which volume decreases, the system is compressed, and the paths in which volume increases, the system is expanded.
Now as you can see, the clockwise rotation and the anticlockwise rotation is equal, and the expansion of the system is equal (in extent) to the compression, so the total (net) work done becomes ZERO, though area under PV curve is not zero.
From the cyclic process,we can conclude one more thing: that, the total Internal energy change is also ZERO.
Thanks!!
