2. Liquid sample A freezes at -8°C. 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 > 0II. DSsurr > 0III. DSuniv > 0IV. GSsys > 0
I III IV I and III III and IV
I. DSsys > 0II. DSsurr > 0III. DSuniv > 0IV. GSsys > 0
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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