Scaling of the Thermal Conductivity Near the Gas-Liquid Critical Point

The thermal conductivity of a gas becomes infinite at the critical point. It is shown that the experimental data for the thermal conductivity of CO₂ satisfy scaling-law relations very similar to those previously established for equilibrium properties near the critical point. The analysis also suggests that the values reported in the literature for the critical exponent of the Rayleigh linewidth should be revised downwards.