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Which, if any, of the following statements about entropy is/are true?

  1. Jul 7, 2011 #1
    Which, if any, of the following statements about entropy is/are true?

    My answers are in brackets...which one(s) did I answer incorrectly? An explanation of why it's wrong would also be helpful.

    • For a process in which Sgen = 0 is a reversible process. [True]
    • Entropy is a measure of the order of a system. As time progresses, all natural systems will tend toward a state of higher order and less disorder. [False]
    • Entropy is reported in units of J/K. [True]
    • Entropy provides the arrow for time. [True]
    • For a process in which Sgen > 0 is a real process. [True]
    • Entropy is the same as energy and therefore reported in units of J. [False]
    • For a process in which Sgen < 0 is an impossible process. [False]
    • Entropy is a nonconserved property; there is no such thing as a conservation of entropy principle. Entropy is conserved only for idealized reversible processes; it increases for all real processes. [True]

    Thank you for your help.
     
  2. jcsd
  3. Jul 8, 2011 #2

    Mapes

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    For "For a process in which Sgen < 0 is an impossible process. [False]", what's your reasoning?
     
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