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A vertical piston- cylinder device contains 0.85 kg of R134a at -10°C. The piston has free...

A vertical piston- cylinder device contains 0.85 kg of R134a at -10°C. The piston has free movement and its mass is 12 kg, with a diameter of 25 cm. The local atmospheric pressure is 87.6018 kPa. Heat is transferred to R-134a until its temperature is 15°C. Determine:
a) The developed work, in kJ
b) Heat transfer, in kJ

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