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1. For a reaction, the DS = -30J/K and DH=25kJ. Is this reaction spontaneous at STP?
no
yes
need more info
only at high pressures
only at low pressures

2. The second law of thermodynamics states that:
the entropy of a perfect crystal is zero at 0 K.
the entropy of the universe is constant
the energy of the universe is increasing.
the entropy of the universe is increasing.
the energy of the universe is constant.

3. 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.

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. A change of state occurs within a system and produces 64.0 kB of heat which is transferred to the surrounding at a constant pressure and a constant temperature of 300K. For this process DSsurroundings is:
64.0 kJ
-64.0 kJ
-213 J/K
213 J/K
none of these

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