Q2 0 53 Kg Argon Is Compressed Slowly In A Polytropic Process With N 1 3 From 135 Kpa And 13 C In A Piston Cylinder De 1 (36 KiB) Viewed 51 times
Q2 0 53 Kg Argon Is Compressed Slowly In A Polytropic Process With N 1 3 From 135 Kpa And 13 C In A Piston Cylinder De 2 (40.85 KiB) Viewed 51 times
Q2.0.53-kg argon is compressed slowly in a polytropic process with n= 1.3 from 135 kPa and 13 °C in a piston-cylinder device, until its volume is reduced to V2 - C. V where the ratio c=0.3. R. - 8.314 kJ/(kmol-K), Mar - 39.948 kg/kmol, C - 0.3122 kJ/(kg-K). Argon can be assumed as ideal gas and c is assumed constant. Determine the entropy change (in kJ/K) in the system during this process. Negative sign must be included if entropy decreases.
Q3. An insulated, vertical piston-cylinder device initially contains 16 kg of water, 6 kg of which is in the vapor phase. Initially the pressure is 200 kPa inside the cylinder. A linear spring is connected to the piston therefore the pressure changes linearly with volume (P=m. V + b). Super heated steam at 0.5 MPa and constant temperature is allowed to enter the cylinder from a supply line until all the liquid in the cylinder has just vaporized and the pressure and volume in the cylinder have both doubled. For this problem you must use property tables (from the textbook). Determine the final temperature (in "C) in the cylinder.
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