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3. with an initial volume of 0.3m3. The its volume is 0.1m2. Determine the change in internal energy during this process. 4. Refrigerant R-134a at 600kPa and 150°C is contained in a spring loaded piston-cylinder device refrigerant is now cooled until its temperature is -30°C and

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5.4s 2 2 12-58十0,079 C2) 3.12-12-52) 2.84 56 T 2 5.405 359.2)-29.89-56) 1 80.348 12- k丁

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