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constants
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1. Which statement is TRUE?
DS decreases with an increase in volume
free energy is independent of volume
free energy is independent of pressure
free energy is dependent on pressure
none of the above

2. Choose the CORRECT statement:
Exothermic reactions are always spontaneous
Free energy is independent of temperature.
A reaction which exhibits a negative value of D S cannot be spontaneous.
At constant P and T, a decrease in free energy insures an increase in the entropy of the system.
None of the above statements are true.

3. The maximum possible useful work obtainable from a process at a constant temperature and pressure is equal to the change in:
temperature
DH
DS
free energy
work

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

5. Rubidium has a heat of vaporization of 69.0 kJ/mol at its boiling point (686oC). For the process Rb(l)-->Rb(g) at 1 atm and 686oC. Calculate the value of DS.
0
69.0 kJ/mol
71.9 J/K mol
61.0 kJ/mol
-7.97 kJ/mol

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