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3.      Two moles of an ideal gas at an initial temperature of 400 K are confined to...

3.      Two moles of an ideal gas at an initial temperature of 400 K are confined to a volume of 40.0 L.  The gas then undergoes a free expansion to twice its initial volume.  The container in which this takes place is insulated so no heat flows in or out.  (1 Liter = 10-3 m3)  R  =  8.314 J/(mole K)

a)      What is the entropy change of the gas?  (15 points)

b)      What is the entropy change of the universe?  (10 points)

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