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

1.	A gas undergoes on 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 `DELTA U=0` `:. Delta Q=Delta W` `(100-20)=20+W_(2) :. W_(2) =+60J`