D30079.docx

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29 Jan 2013
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Q4. Work-heat Internal Energy Relationship 3 (Medium)
In a refrigeration system, the refrigerant gas absorbs 21.39
kJ of energy while expanding against a 0.278 atmosphere
pressure from a volume of 0.0423 liters to a volume of
1.876 liters. What is the energy change of the gas?
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