3. One mole of CO is initially contained on one-half of a well-insulated, rigid tank. Its temperature is 500K. The other half of the tank is initially at vacuum. A diaphragm separates the two compartments. Each compartment has a volume of 1L. Suddenly, the diaphragm ruptures. Use the van der Waals equation for any non-ideal behavior. Answer the following questions:
(a) What is Cv,m at the initial state?
(b) Do you expect the temperature to increase, decrease, or remain constant. Justify your answer.
(c) What is the temperature of the final state?
(d) What is the entropy change of the universe for this process?
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