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83. (a) The temperature is 10.0°C
→
T
= 283 K. Then, with
n
= 3.50 mol and
V
f
/
V
0
= 3/4,
we use Eq. 19-14:
0
ln
2.37kJ.
f
V
Wn
R
T
V
§·
==
−
¨¸
©¹
(b) The internal energy change
Δ
E
int
vanishes (for an ideal gas) when

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