NEETPhysicsThermodynamics
An ideal gas is taken through the cycle (A ) (B C A ) as shown in the figure. If the net heat supplied to the gas in the cycle is (5 ~J ). The magnitude of work done during the process (C A ) is
Options
- A(5 ~J )
- B(10 ~J )
- C(15 ~J )
- D(20 ~J )
Correct answer
A. (5 ~J )
Step-by-step solution
An ideal gas is taken through the cycle (A B C A ) as shown in the figure, From the graph, ( aligned W_ A B & =P d V & =10 (2-1)=10 ~J aligned ) Similarly, (W_ B C =P (0)=0 ~J ) According to the first law of thermodynamics ( Q= U+W ) Here, ( U = 0 ) ( aligned & Q=W & 5=W_ A B +W_ B C +W_ C A & W_ C A =5-W_ A B -W_ B C =5-10-0 & W_ C A =-5 ~J & |W_ C A |=5 ~J aligned ) Hence, the magnitude of work done during the process (C A ) is (5 ~J ).