Ap Chemistry Chapter 16 Multiple Choice Quiz Review With Answers - Malea Mullins, University School Of Jackson Page 6
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1417.
The third law of thermodynamics states
a.
the entropy of the universe is increasing.
b.
the entropy of the universe is constant.
c.
the entropy is zero at 0 K for a perfect crystal.
(Definition!!!)
d.
the absolute entropy of a substance decrease with increasing temperature.
e.
the entropy of the universe equals the sum of the entropy of system and
surroundings.
18.
Which of the following is not a state function.
a.
q
(heat)
b.
G
c.
H
d.
E
e.
P
The standard free energy of formation of AgCl (s) is 110 kJ/mol. ΔG° for the reaction
19.
2 AgCl (s) 2 Ag (s) + Cl
(g) is:
2
a.
110 kJ
b.
220 kJ
110 kJ
c.
220 kJ
d.
e.
none of these
The reaction has been reversed from the formation reaction, so the sign is opposite.
110 kJ/mol * 2 mol = 220 kJ
O (g) CH
(g), ΔH° = 803 kJ
20.
For the reaction, CO
(g) + 2 H
(g) + 2 O
2
2
4
2
which of the following will increase K?
a.
decrease number of moles of methane
b.
increase volume of system
c.
increase the temperature of system
d.
all of the above
e.
none of the above
ΔG/RT
ΔG =
RT ln K which means K = e
The only way to increase K would be to increase T or to decrease ΔG. (To decrease ΔG,
you would have to increase T or increase ΔS. To increase ΔS would be to increase
disorder or change ΔS so that S
< S
. Answer A would violate this. Volume would
final
initial
have no effect.
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