FIGURE P21.60 is the pV diagram of Example 21.2, but now
Chapter 21, Problem 21.89(choose chapter or problem)
FIGURE P21.60 is the pV diagram of Example 21.2, but now the device is operated in reverse. a. During which processes is heat transferred into the gas? b. Is this QH, heat extracted from a hot reservoir, or QC, heat extracted from a cold reservoir? Explain. c. Determine the values of QH and QC. Hint: The calculations have been done in Example 21.2 and do not need to be repeated. Instead, you need to determine which processes now contribute to QH and which to QC. d. Is the area inside the curve Win or Wout? What is its value? e. The device is now being operated in a ccw cycle. Is it a refrigerator? Explain.
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