Question

A thermodynamic system is taken through the cycle abcda. The work done by the gas along the path bc is : 

(1) Zero 

(2) 30 J 

(3) –90 J 

(4) –60 J

Answer 1

Correct option is : (1) Zero 

For path bc volume is constant 

so work done is zero 

\(\Rightarrow\) W = 0