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Standard XII
Chemistry
Compressibility Factor
The compressi...
Question
The compressiblity factor for a real gas at high pressure is:
A
1
+
R
T
P
b
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B
1
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C
1
+
P
b
R
T
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D
1
−
P
b
R
T
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Solution
The correct option is
A
1
+
P
b
R
T
The van der Waals' equation is given as
(
P
+
a
V
2
)
(
V
−
b
)
=
R
T
(for 1 mol of gas)
At high pressure,
a
V
2
term can be neglected, since P is large.
P
V
−
P
b
=
R
T
or
P
V
=
R
T
+
P
b
P
V
R
T
=
1
+
P
b
R
T
Z
=
1
+
P
b
R
T
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Q.
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Compressibility Factor
Standard XII Chemistry
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