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Extra Credit (20 pts) 10 moles of an ideal gas expands from a volume of 0.2 m3 to a volume of 0.8 m3 by an adiabatic free expansion (no work). a. Does the internal energy of the gas change? Why or why not? b. Does the temperature of the gas change? Why or why not? c. Does the entropy of the gas change? Why or why not d. Would the entropy change be any different if the gas expanded from the same initial state to the same final state isothermally? Justify your answer.
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