2. 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.
3. Which statement is FALSE?
DS increases as pressure decreases for an ideal gas, enthalpy is not pressure-dependent the lowest value of free energy occurs at equilibrium DS increases as volume increases all statements are true
4. Rubidium has a heat of vaporization of 69.0 kJ/mol at its boiling point (686oC). For the process Rb(l)-->Rb(g) at 1 atm and 686oC. Calculate the value of DG.
0 69.0 kJ/mol 71.9 J/K mol 61.0 kJ/mol -7.97 kJ/mol
5. 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
| about us | contact us
tutorials index | organic
chemistry | practice tests | online
quizzes | reference tools
site copyright (c) 2002 to neopages.com