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set 5 - Chem 3433 Problem Set 5 Due before class on 1 A...

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Chem 3433 – Problem Set 5 Due before class on 10/5/11 1 A one-mole sample of a monatomic perfect gas with a constant pressure heat capacity of 20.85 J/(K mol) is initially at a pressure of 3.25 bar at 200 K. It undergoes an adiabatic reversible expansion until its pressure is 1.52 bar. Calculate: q, w, U, H and S. 2. A 4 L volume of a perfect gas at 300.0 K and 1.00 bar pressure undergoes a reversible isothermal compression until the pressure becomes 4.00 bar. Calculate: q, w, U, H and S. Cp,m for CHCl3 is (91.47 + 7.5x10 -2 T) J/(K mol) in a limited temperature range. One mol of this compound at 325 K is cooled at constant P to 275 K by contact with a large reserve at 275 K. The temperature of the reserve does not change. 3. Calculate the change in enthalpy for the CHCl3 sample. 4. Calculate the change in entropy for the CHCl3 sample. 5a. Calculate the change in entropy for the reserve. 5b. Calculate the change entropy of the universe.
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set 5 - Chem 3433 Problem Set 5 Due before class on 1 A...

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