1.)
If the following statements are True, Place a T in the line before the statement.
If False, place an F.
F
When heat is absorbed by the system during a process, the sign of
q
is negative.
T
A system undergoing a reversible process may be regarded as being at equilibrium.
T
The energy of an isolated system is constant.
F
When water freezes spontaneously, its entropy must increase.
F
The entropy of mixing two gases increases as the concentration approaches a mole fraction
of 1.0.
F
For a spontaneous process at constant
T
and
P
,
±
G
° must be negative.
T
The chemical potential is the same as its partial molar Gibbs energy.
T
For an ideal solution,
μ
A
is smaller than
μ
A
° upon adding a solute B
F
To determine a protein's molecular weight, freezing point depression is more accurate than
measuring its osmotic pressure.
F
The biochemist's standard state differs from a physical chemist's in that the concentration of all
products and reactants is 10
7
M
.
F
The standard state EMF of a redox reaction (
E
°) does not change with temperature.
F
According to Le Chatelier's principle, adding more reactant in the following reaction will help
shift the equilibrium towards more product formation in a closed reaction vessel.
CaCO
3
(s)
±
CaO
(s)
+ CO
2
(g)
F
At equilibrium,
±
r
G
° = 0.
F
Electrons travel through the salt bridge in a
Daniell cell
to complete the circuit.
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For questions 2  10, circle the correct answer.
2.)
The equation below that best describes the
first
law of thermodynamics is:
a.)
±
H
=
C
P
±
T
b.)
±
U
=
C
V
±
T
c.)
±
H
=
±
U
+
P
±
V
d.)
±
U
=
q
+
w
e.)
±
G
=
±
H

T
±
S
3.)
The statement below that best describes the
second
law of thermodynamics is:
a.) The entropy of vaporization is 88 kJ K
1
mol
1
b.) Mixed second partial derivatives are independent of the order in which the derivatives are
taken
c.) At equilibrium, the entropy of an isolated system reaches a maximum
d.) A spontaneous process is characterized by a decrease in entropy between the initial and final
states
e.) The entropy change between any two states of a system requires calculation along an
irreversible path between two states
4.)
The
third
law of thermodynamics
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 Fall '10
 FISHER
 Thermodynamics, Entropy, RT ln

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