To a closed system 150 kJ of work… solved problem



To a closed system 150 kJ of work is supplied. If the initial volume is 0.6 m3 and pressure of the system changes as p = 8 -4V, where p is in bar and V is in m3, determine the final volume and pressure of the system.




To a closed system 150 kJ of work is supplied. If the initial volume is 0.6 m3 and pressure of the system changes as p = 8 -4V, where p is in bar and V is in m3, determine the final volume and pressure of the system.

To a closed system 150 kJ of work... solved problem
To a closed system 150 kJ of work… solved problem




1. 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.

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2. 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.

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3. To a closed system 150 kJ of work is supplied. If the initial volume is 0.6 m3 and pressure of the system changes as p = 8 -4V, where p is in bar and V is in m3, determine the final volume and pressure of the system. #closed system 150 kJ

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4. A fluid at a pressure of 3 bar, and with specific volume of 0.18 m3/kg, contained in a cylinder behind the piston expands reversibly to a pressure of 0.06 bar according to a law, p = C/v2, where C is a constant. Calculate the work done by the fluid on the piston.

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5. A cylinder contains 1 kg of a certain fluid at an initial pressure of 20 bar. The fluid is allowed to expand reversibly behind a piston according to a law pV2 = constant until the volume is doubled. The fluid is then cooled reversibly at constant pressure until the piston regains its original position ; heat is then supplied reversibly with the piston firmly locked-in position until the pressure rises to the original value of 20 bar. Calculate the net work done by the fluid, for an initial volume of 0.05 m3.

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