Heat and Thermodynamics 5 Question 27

28. An ideal monoatomic gas is taken round the cycle ABCDA as shown in the pV diagram (see figure). The work done during the cycle is

(1983, 1M)

(a) pV

(b) 2pV

(c) 12pV

(d) zero

Show Answer

Answer:

Correct Answer: 28. (a)

Solution:

  1. Work done in a cyclic process = area between the cycle

=AB×BC=(2pp)×(2VV)=pV

NOTE

If cycle is clockwise ( p on Y-axis and V on X-axis) work done is positive and if it is anti-clockwise work done is negative.



NCERT Chapter Video Solution

Dual Pane