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A frictionless piston-cylinder device contains 2 kg of air at 100 kPa and 300 K (state 1). Air is now compressed until it reaches a final temperature of 360K (state 2). During the process, the pressure of the air inside the piston-cylinder device varies with the volume according to the equation:
PV^1.2 = C,
Where C is a constant. Determine:
A) The magnitude and direction of the work during this process
B) The magnitude and direction of the heat transfer during this process
An unsuited free diver can work in a pressure of up to 490KN/m^2 and a suited diver in pressure of up to 1815 KN/m^2. Calculate the maximum depths at which they might work in sea-water which has a specific gravity of 1.03.
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Liquid water at 200 kPa and 20 C is heated in a chamber by mixing it with superheated steam at 200 kPa and 150 C. Liquid water enters the mixing chamber at a rate of 1.3 kg/s, and the chamber is estimated to lose heat to the surrounding air at 25 C a..
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