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1. Which of the following statements is always TRUE for a spontaneous process?

I. DSsys > 0
II. DSsurr > 0
III. DSuniv > 0
IV. GSsys > 0


I
III
IV
I and III
III and IV

2. Liquid sample A freezes at -8C. Determine the signs of DH, DS, and DG.
+,+,+
+,-,-
-,-,-
-,+,0
None of the above

3. A system can achieve the lowest possible free energy by going into:
high pressure
presence of catalyst
equilibrium
completion
none of the above

4. The melting point of water is 0oC at 1 atm pressure because under these conditions:
DS for the process H2O(s)--> H2O(l) is positive.
DS and DSsurr for the process H2O(s)--> H2O(l) are both positive.
DS and DSsurr for the process H2O(s)--> H2O(l) are equal in magnitude and opposite in sign.
DG is positive for the process H2O(s)--> H2O(l).
None of these is correct.

5. Which statement is FALSE?
DS increases as pressure decreases
for an ideal gas, enthalpy is not pressure-dependent
the lowest value of free energy occurs at equilibrium
DS increases as volume increases
all statements are true

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