A piston-cylinder device contains helium gas initially at
A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 390 kPa and 140 degrees C. Determine the heat loss or gain during this process.
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a piston-cylinder device contains helium gas initially at 145 kpa 20 degrees c and 05 m3 the helium is now compressed
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