A gas undergoes a change of state during which 100 J of heat is supplied to it and it does 20 J of work. The system is brought back to its original state through a process during which 20 J of heat is released by the gas. What is the work done by the gas in the second process ?

A gas undergoes a change of state during which 100 J of heat is suppli

1.	A gas undergoes a change of state during which 100 J of heat is supplied to it and it does 20 J of work. The system is brought back to its original state through a process during which 20 J of heat is released by the gas. What is the work done by the gas in the second process ?
Answer» SOLUTION :In a CYCLIC PROCESS `DeltaU=0` `:.DeltaQ=DeltaW"" (100-20)=20+W_(2)` `:.W_(2)=+60J`