A fluid at 0.7 bar occupying 0.09 m3 iscompressed reversibly to a pressure of 3.5 bar according tothe law Pvn=constant the fluid is then heatedreversibly at constant volume until the pressure is 4 bar thespecific volume is then 0.5 m3 /kg. A reversibleexpansion according to the law pv2 =constant restore thefluid to its initial state.

1) Calculate the mass of the fluid present.

2) Calculate the value of n in the first process.

3) Calculate The net work of cycle.