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Problem 1.6
[Difficulty: 1]
Given:
Data on oxygen tank.
Find:
Mass of oxygen.
Solution:
Compute tank volume, and then use oxygen density (Table A.6) to find the mass.
The given or available
data is:
D1
6
f
t
⋅
=
p
1000 psi
⋅
=
T
77
460
+
()
R
⋅
=
T
537 R
⋅
=
R
O2
48.29
ft lbf
⋅
lbm R
⋅
⋅
=
(Table A.6)
For oxygen the critical temperature and pressure are:
T
c
279 R
⋅
=
p
c
725.2 psi
⋅
=
(data from NIST WebBook)
so the reduced temperature and pressure are:
T
R
T
T
c
1.925
=
=
p
R
p
p
c
1.379
=
=
Using a compressiblity factor chart:
Z
0.948
=
Since this number is close to 1, we can assume ideal gas behavior.
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 Fall '07
 Lear
 Fluid Mechanics

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