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1. For the phase change of liquid to solid, DS is:
0
positive
negative
positive at high temperature
none of the above

2. 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

3. A change of state occurs within a system and produces 64.0 kB of heat which is transferred to the surrounding at a constant pressure and a constant temperature of 300K. For this process DSsurroundings is:
64.0 kJ
-64.0 kJ
-213 J/K
213 J/K
none of these

4. 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

5. DS for the universe is:
always positive
sometimes positive
always negative
sometimes negative
constant

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