Question

46. An ideal gas temperature 27 °C, Pressure 0.2 MPa and volume 01 m3. If the gas is compressed to 1
MPa and 0.04 m3, find out the temperature of gas. (W-2019, 4 marks)
47. 3 kg of gas enclosed in a closed vessel has absolute pressure 2 bar and temperature 27°C. If it is
compressed up to 5 bar pressure, find (i) Final temperature and (ii) change in internal energy. Take Cp=
1.005 Kj/kg K and R= 0.297 Kj/kg K. (S-2019, 4 marks)
48. If a gas have temperature, pressure and volume as 300°c, 10 bar and 14.5m3 respectively. Find its
characteristic gas constant R, If mass of gas is 30Kg. (W-2018, 3 marks)
49. An ideal gas temperature 27°C, Pressure 0.2 MPa and volume 0.1 m3. If the gas is compressed to 1
MPa and 0.04 m3, find out the temperature of gas. (S-2018, 4 marks)
50. Find the ratio of specific heats and Gas characteristic constant if specific heat at const pressure =
0.987K]/kgk and specific heat at const volume=0.73KJ/KgK. (W-2017, 2 marks)
51. Air of volume 0.1 m3 and pressure 1.5 bar absolute is expanded up to volume 0.5 m isothermally.
Find its final pressure and heat transfer during the process. (W-2017, 4 marks)
52. 1 kg of air is at 15 bar absolute pressure and 980°C. It is expanded upto 2.5 bar absolute pressure by
isentropic process. Find (a) Final volume (b) Final temperature (c) workdone. Take R= 0.287 KJ/kg K
and y= 1.4(W-2017, 4 marks)​

Answer 1

Answer:

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