# The properties of a closed system.. pV = 3. solved problem

#### The properties of a closed system following the relation between pressure and volume as pV = 3 where p is in bar V is in m3. Calculate the work done when the pressure increases from 1.5 bar to 7.5 bar.

The properties of a closed system following the relation between pressure and volume as pV = 3 where p is in bar V is in m3. Calculate the work done when the pressure increases from 1.5 bar to 7.5 bar.

1. A piston and cylinder machine containing a fluid system has a stirring device as shown in fig. The piston is frictionless, and it is held down against the fluid due to atmospheric pressure of 101.3 kPa. The stirring device is turned 9500 revolutions with an average torque against the fluid of 1.25 Nm. Meanwhile the piston of 0.65 m diameter moves out 0.6 m. Find the net work transfer for the system.

2. A diesel engine piston which has an area of 45 cm2 moves 5 cm during part of suction stroke is 0.9 X 105 N/m2. The difference between the suction and atmospheric pressure is accounted for flow resistance in the suction pipe and inlet valve. Find the net work done during the process.

3. The properties of a closed system following the relation between pressure and volume as pV = 3 where p is in bar V is in m3. Calculate the work done when the pressure increases from 1.5 bar to 7.5 bar.