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A piston-cylinder device contains 0.85 kg of refrigerant-134a at -10 degree Celsius. 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 15degree Celsius. Determine (a) the final pressure, (b) the change in volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-134a.
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