The mean specific heats of pure nitrogen at constant pressure (1 atm.) have been determined at various temperatures given in the following table.
cp=specific heat at constant pressure.
Cp=molecular heat at constant pressure, i.e. cp=Mcp.
Specific and molar heats of gaseous nitrogen at constant pressure | t° c. | cp | Cp | | 0 | 0.2491 | 6.98 | | 100 | 0.2501 | 7.01 | | 200 | 0.2510 | 7.03 | | 300 | 0.2520 | 7.06 | | 400 | 0.2529 | 7.09 | | 500 | 0.2539 | 7.11 | | 600 | 0.2548 | 7.14 | | 700 | 0.2558 | 7.17 | | 800 | 0.2567 | 7.19 | | 900 | 0.2577 | 7.22 | | 1000 | 0.2586 | 7.25 | | 1100 | 0.2596 | 7.27 | | 1200 | 0.2605 | 7.30 | | 1300 | 0.2615 | 7.33 | | 1400 | 0.2624 | 7.35 |
The value of cp is given by the equation
cp = 0.2491 + 0.0000095t.
In the next table are given the molecular specific heats at constant volume and the ratio Cp/Cv.
Molar heats of gaseous nitrogen at constant volume, and ratio of the specific heats | t° C. | Cv | γ=Cp/Cv | | 0 | 4.890 | 1.408 | | 100 | 4.926 | 1.404 | | 200 | 4.968 | 1.400 | | 300 | 5.014 | 1.396 | | 400 | 5.066 | 1.392 | | 500 | 5.104 | 1.389 | | 600 | 5.143 | 1.386 | | 700 | 5.184 | 1.383 | | 800 | 5.238 | 1.379 | | 900 | 5.280 | 1.376 | | 1000 | 5.308 | 1.374 |
The thermal conductivity of the gas at 0° C. is 0.00005660, at 55° C. is 0.0000569, and at 100° C. is 0.0000718. |