A piston cylinder device contains 0.850 kg of refrigerant-134a at -10.0°C. The piston that is e and has a mass of 12.0 kg and a diameter of 25.0 cm. The local atmospheric pressure is 88.0 heat is transferred to refrigerant-134a until the temperature is 15.0°C. Determine (a) the final ) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-

A piston cylinder device contains 0.850 kg of refrigerant-134a at -10.0°C. The piston that is e and has a mass of 12.0 kg and a diameter of 25.0 cm. The local atmospheric pressure is 88.0 heat is transferred to refrigerant-134a until the temperature is 15.0°C. Determine (a) the final ) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-

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

A piston-cylinder device contains 0.850 kg of refrigerant-134a at –10.0°C. The piston that is
free to move and has a mass of 12.0 kg and a diameter of 25.0 cm. The local atmospheric pressure is 88.0
kPa. Now, heat is transferred to refrigerant-134a until the temperature is 15.0°C. Determine (a) the final
pressure, (b) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-
134a.
Assume the following: va-10°C = 0.2302 m³/kg, va-15°C = 0.2544 m³/kg, ha-10°C = 247.22 kJ/kg, h@15°C
= 268.18 kJ/kg

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