The assignment: a fixed quantity of an ideal gas (r 0.28 kj/kgk; cv-0.71kj/kgk) is expanded from an initial condition of 35 bar, 500°c, 0.1m, to a final state of1.3mand 20c using a reversible polytropic process. calculate: (i) the index of expansion; (ii) the change in internal energy; (ii)the amount of heat transferred to or from the gas. show all your working clearly-and legibly if you're handwriting your submission.
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Physics, 22.06.2019 06:20
Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.
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Physics, 22.06.2019 15:20
Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.
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Physics, 22.06.2019 16:00
What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.
Answers: 3
The assignment: a fixed quantity of an ideal gas (r 0.28 kj/kgk; cv-0.71kj/kgk) is expanded from a...
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