c) A piston cylinder assembly initially contains water at 75 kPa and 8 percent quality (x = 0.08) with a volume of 2 m'. The water is then heated until its pressure is 400 kPa. During this process, the pressure and volume are related by P = av +b, where a = 50 kPa/m' and b = -25 kPa. Both 'a' and 'b' are constants. i) Determine the specific volume (m/kg), specific internal energy (k)/kg) and mass (kg) of water at the initial state. ii) Determine the specific volume (m/kg) and specific internal energy (kJ/kg) of water at the

c) A piston cylinder assembly initially contains water at 75 kPa and 8 percent quality (x = 0.08) with a volume of 2 m'. The water is then heated until its pressure is 400 kPa. During this process, the pressure and volume are related by P = av +b, where a = 50 kPa/m' and b = -25 kPa. Both 'a' and 'b' are constants. i) Determine the specific volume (m/kg), specific internal energy (k)/kg) and mass (kg) of water at the initial state. ii) Determine the specific volume (m/kg) and specific internal energy (kJ/kg) of water at the

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

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.

Question

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c) A piston cylinder assembly initially contains water at 75 kPa and 8 percent quality (x = 0.08)
with a volume of 2 m². The water is then heated until its pressure is 400 kPa. During this
process, the pressure and volume are related by P = av + b, where a = 50 kPa/m³ and b = -25
kPa. Both 'a' and 'b' are constants.
i) Determine the specific volume (m/kg), specific internal energy (kl/kg) and mass (kg) of
water at the initial state.
ii) Determine the specific volume (m/kg) and specific internal energy (kJ/kg) of water at the
final state.
ii) Sketch the process on a pressure (kPa) versus volume (m³) diagram and label all properties.
iv) Determine the work done (kJ) and heat transferred (kJ) during the process.
v) Describe another method of calculating the work done other than the method you used in
part (iv) above. Show the calculation to obtain the work done using this second method.

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