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1. Which of these statements is false?
For a spontaneous reaction DG is negative
Independent of T, a reaction must be spontaneous if DH = 0 and DS is positive
A spontaneous reaction is always fast
A spontaneous reaction occurs without outside intervention
None of the above is false

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

3. 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

4. Which of the following will be true when a pure substance in liquid phase freezes spontaneously?
DG, DH, and DS are all positive
DG, DH, and DS are all positive

5. 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.

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