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1. Make a control volume around the refrigerator in Fig. 1.3. Identify the mass flow of external air and show where you have significant heat transfer and where storage changes. Heat to room ... 4 Warm vapor (2 Condenser Work Warm liquid Compressor Expansion valve X or Evaporator capillary tube Cold liquid + vapor FIGURE 1.3 Cold vapor O T Schematic diagram Heat from cold of a refrigerator. refrigerated space Explain your work