Example 2.24:  Calculate the thermal conductivity of nitrogen at 300 °K.  η = 178.78 μP, 

Cp = 6.5 + 0.001T cal/(mol·°K), Tc = 126.05 °K.

 

Solution

$                 Reduced temperature, Tr = 300/126.05 = 2.38

$                 Viscosity η = 1.788 ´ 10-4 P

$                 Specific heat at constant pressure, CP

 CP = 6.5 + 0.001T = 6.5 + 0.001(300) = 6.8 cal/(mol·°K)

$                 Specific heat at constant volume, CV (assume ideal behavior)

 

 

$                 Thermal conductivity, λG (Equation 2.68)