THERMAL CONDUCTIVITY OF SULFUR DIOXIDE AND THERMAL ACCOMMODATION COEFFICIENT FOR SULFUR DIOXIDE ON A GAS-COVERED PLATINUM SURFACE AS A FUNCTION OF TEMPERATURE.

The thermal conductivity of sulfur dioxide (99. 98% pure) was measured in the temperature range 361-1237 K, using an improved conductivity column developed from measurements of heat transfer in the continuum region. Similar measurements in the temperature-jump region were used to test the temperature-jump theory qualitatively by computing the values of thermal conductivity. This theory was then employed to generate the values of the thermal accommodation coefficient for a gas-covered platinum surface as a function of temperature. The existing theories of thermal conductivity were compared and the diffusion coefficient for vibrational energy was computed as a function of temperature.