Estimation of thermal conductivity at specified temperature and pressure

Example 2.6 Estimation of thermal conductivity at specified temperature and pressure Estimate the thermal conductivity of methane at / 380 K and P = 30atm. At 300K and latm, the thermal conductivity is 

The thermal conductivities of dilute monatomic gases are well understood. The thermal conductivity of a dilute gas composed of rigid spheres of diameter d is expressed as 

The Chapman-Enskog formula for monatomic gases at low density and temperature T produces better predictions, and is given by 

A simple semiempirical equation for polyatomic gases at low densities is given by 

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Example 2.4 Estimation of thermal conductivity at specified temperature and pressure... 

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