CHEM131
Homework n°2
1.
Levine 2.1
a.
The kinetic energy of a system of several particles equals the sum of the kinetic energies of the
individual particles.
True
b.
The potential energy of a system of interacting particles equals the sum of the potential energies of
the individual particles.
False
2.
Levine 2.13
a.
For every process,
∆
E
syst
= 
∆
E
surr.

True
For any process:
∆
E
syst
+
∆
E
surr
= 0
b.
For every cyclic process, the final state of the system is the same as the initial state.

True
c.
For every cyclic process, the final state of the surroundings is the same as the initial state of the
surroundings.

False.
Final and initial states refer only to the system and not to the surroundings.
d.
For a closed system at rest with no fields present, the sum q + w has the same value for every process
that goes from a given state 1 to a given state 2.

True.
The sum of q + w =
∆
U, that is a state function of the system.
e.
If systems A and B each consist of pure liquid water at 1 bar pressure and if T
A
> T
B
, then the internal
energy of system A must be greater than that of B.

False.
∆
U= q + w
3.
Levine 2.24
a.
The quantities H, U, PV,
∆
H, and P
∆
V all have the same dimensions.
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 Spring '08
 Lindenberg
 Thermodynamics, Levine, Adiabatic process, Isothermal process, perfect gas, constant volume process

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