An ideal gas at 2 bar is contained in a cylinder behind a piston with the initial volume being 0.02 m3 . When it expands reversibly to a final volume of 0.025 m3 according to a law 𝑝𝑉 1.5 = 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡, where 𝑝 is pressure and V is total volume, calculate the work done on the fluid by using 𝑊 = − ∫ 𝑝𝑑𝑉 .
0.25 kg of carbon dioxide (CO2) is compressed reversibly and isentropically from 2.0 bar 27 ˚C to 4.0 bar. Assume CO2 is a perfect gas and its relative molecular mass is 44. Calculate:
1) Specific gas constant of CO2 gas
2) work done
3) heat flow
A relatively small nozzle is horizontally placed and a working fluid is passing through steadily. At the nozzle’s inlet, the velocity of fluid is 5 m/s and the specific enthalpy is 2200 kJ/kg. At the exit from nozzle, its specific enthalpy is 2000 kJ/kg. Calculate:
1)velocity at fluid exit
2) The mass flow rate of fluid when the inlet area is 0.01 m2 and specific volume at inlet is 0.5 m3 /kg
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