A sample of an ideal gas is taken through the cyclic process abca and shown in the figure. The chagne in the internal energy of the gas along the path ca is `-180J`. The gas aborbs 250J of heat along the path ab and 60 J along the path bc. the work done by the along the path abc is:

Options

A. 140 J
B. 100 J
C. 120 J
D. 130 J

Answer

D

Explanation

`triangleu_(ca)= -180, triangleU_(ac)=180`
For abc
`-triangleQ= triangleU+w, 310=180+W`
`W= 130J`.