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Specific Heat Ratio of Air

Specific Heat Ratio of air at temperatures from -40 - 1000oC (-40 - 1500oF) at standard atmospheric pressure - Imperial and SI Units

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Specific Heat Ratio of Air at Standard Atmospheric Pressure in Imperial (BG) Units:

Temperature
- t -
(oF)
Specific Heat Ratio
k = cp / cv
-40 1.401
-20 1.401
0 1.401
10 1.401
20 1.401
30 1.401
40 1.401
50 1.401
60 1.401
70 1.401
80 1.400
90 1.400
100 1.400
120 1.400
140 1.399
160 1.399
180 1.399
200 1.398
300 1.394
400 1.389
500 1.383
750 1.367
1000 1.351
1500 1.329
  • cp = specific heat - constant pressure
  • cv = specific heat - constant volume

Specific Heat Ratio of Air at Standard Atmospheric Pressure in SI Units:

Temperature
- t -
(oC)
Specific Heat Ratio
k = cp / cv
-40 1.401
-20 1.401
0 1.401
5 1.401
10 1.401
15 1.401
20 1.401
25 1.401
30 1.400
40 1.400
50 1.400
60 1.399
70 1.399
80 1.399
90 1.398
100 1.397
200 1.390
300 1.379
400 1.368
500 1.357
1000 1.321
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