DCGN209Spring’10: Homework#9 p. 1 of 2
I.
Study Questions & Problems (not
to hand in)
.
A.
Exactly 1.2028 moles of He(g) initially exerts a pressure of 800 kPa at 26.85
0
C.
The gas expands
isothermally
against a constant opposing pressure of 400.0 kPa
to a final pressure of 400.0 kPa.
B.
Exactly 1.2028 moles of He(g) initially exerts a pressure of 800 kPa at 26.85
0
C.
The gas expands
isothermally
and
reversibly
to a final pressure of 400.0 kPa.
C.
Exactly 1.2028 moles of He(g) initially exerts a pressure of 800 kPa at 26.85
0
C.
The gas is heated at constant volume to a final temperature of 400.0 K.
R
C
V
2
3
=
D.
Exactly 1.2028 moles of He(g) initially exerts a pressure of 800 kPa at 26.85
0
C.
The gas is heated at constant pressure to a final temperature of 400.0 K.
E.
Exactly 1.2028 moles of CO
2
(g) initially exerts a pressure of 800 kPa at 26.85
0
C.
The gas is heated at constant pressure to a final temperature of 400.0 K.
(
)
K
mole
J
T
x
T
x
C
P
2
5
3
10
62
.
8
10
79
.
8
22
.
44
−
+
−
−
+
=
F.
Exactly 1.2028 moles of H
2
O, initially solid at 0.00
0
C & 1.000 atm, is
completely converted to liquid at 0.00
0
C & 1.000 atm.
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 Spring '08
 Simmons,E
 kPa, final temperature

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