Helium at 14.7 psia is compressed at a constant temperature of and 68 degrees Fahrenheit. Calculate the work done in BTU/lbm if the compression ratio is 4. (R=0.4968 BTU/lb-R) -564 -576 -355 -364 In a constant temperature process, how much horsepower is needed to compress 800 ft^3 of air per minute from 14.7 to 120 psia? 200 Hp -108 Hp 108 Hp -203 Hp

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Q: In the factory where you work, there is a system like the one below, where you have two tanks at…

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Q: How many tons of refrigeration is required to cool 40 GPM of liquid from 140 F to  55 F?  The liquid…

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Q: Air at 105 kPa and 25°C flows from a 7.5-cm circular duct into a 22.5-cm circular duct. The…

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Q: Liquid water sits in a large storage tank 36 °C. Prior to entering a 0.528 meter pipe, the water…

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Q: jet plane travels in air at pressure of 101.325 kPa and 10°C at a speed of 2000 kph. Based on the…

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Q: Convert enthalpy value of 247 Btu/lbm to kJ/kg

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Q: Apply the first law of thermodynamics to flow system with two inlets and one outlet. Assume that…

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Q: Answer the following questions about air flowing through a nozzle as shown in the schematic below.…

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.