3 kg of air at 150 kPa pressure and 360 K temperature is compressed p…
Previous year question for THERMODYNAMICS.
Question
3 kg of air at 150 kPa pressure and 360 K temperature is compressed polytropically to pressure 750 kPa according to the law $PV^{1.2} = \text{constant}$. Subsequently, the air is cooled to the initial temperature at constant pressure. This is followed by expansion at constant temperature till the original pressure of 150 kPa is reached. Sketch the cycle on P-V and T-S plots and determine the work done, heat transfer and entropy change for each process.
- Year: 2018
- Subject: THERMODYNAMICS