A piston-cylinder device contains (0.85 kg) of refrigerant (134a) at (-10°C). The piston that is free to move has a mass of (12 kg) and a diameter of (25 cm). The local atmospheric pressure is (88 kPa). Now, heat is transferred to refrigerant (134a) until the temperature is (15°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).

A piston-cylinder device contains (0.85 kg) of refrigerant (134a) at (-10°C). The piston that is free to move has a mass of (12 kg) and a diameter of (25 cm). The local atmospheric pressure is (88 kPa). Now, heat is transferred to refrigerant (134a) until the temperature is (15°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).

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.3P

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