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. 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 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
5. 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
| about us | contact us
tutorials index | organic
chemistry | practice tests | online
quizzes | reference tools
site copyright (c) 2002 to neopages.com