E2.24 Thermal Conductivity

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

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

Solution

Reduced temperature, T_r = 300/126.05 = 2.38

Viscosity η = 1.788 ´ 10^-4 P

Specific heat at constant pressure, C_P

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

Specific heat at constant volume, C_V (assume ideal behavior)

Thermal conductivity, λ_G (Equation 2.68)