Ideal gas is taken through the process shown in the figure :

Options

A. In process `AB`, work doen by system in positive
B. In process `AB`, heat is rejected out of the system.
C. In process `AB`, internal energy increases
D. In process `AB` internal energy decreases and in process `BC` internal energy increases.

Answer

B

Explanation

In process `AB`
`T =` constant
`P =` increases `P alpha(1)/(V)`
or `V =` decreases `DeltaQ = DeltaW. Deltaw =- ve`
or `DeltaQ =- ve`
`:.` heat is rejected out of the system.