Data for Molar Volume-Altitude Graph
Altitude, ft.
Molar Volume, ft.³
Altitude, ft.
Molar Volume, ft.³
5,000
420
50,000
2200
10,000
490
55,000
2850
15,000
590
60,000
3700
20,000
680
65,000
4900
25,000
820
70,000
6200
30,000
980
75,000
7800
35,000
1230
80,000
10,000
40,000
1410
85,000
12,600
45,000
1750
90,000
15,900
95,000
20,200
100,000
25,600
This data assumes a constant temperature ($-60^\circ$C) above 65,000 ft., and below that altitude is based on representative pressures and temperatures taken from Washington, Albuquerque, Pittsburgh and Lakehurst soundings.
Individual variations from season to season, and from station to station may be noted in the graphs at the left of Figures 19 and 20. These variations are at most about 10%.
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