Contribution of Interionic Forces to the Thermal Conductivity of Dilute Electrolyte Solutions

The contribution λ_ion of interionic forces to the thermal conductivity of dilute electrolyte solutions is calculated on the basis of a model previously proposed and is found to vary as k³ or (concentration)${}^{\frac{3}{2}}$ according to the expression ${\lambda }_{\mathrm{ion}}=\frac{1}{3}{\mathrm{\kappa (e}}^2\mathrm{/\epsilon T)}{\displaystyle \sum _{\beta }}{z}_{\beta }^2{c}_{\beta }{D}_{\beta }$ , where k is the inverse Debye length, e is the electronic charge, ε is dielectric constant of solvent, z is charge number, c_β is concentration of dissolved ion β in units of number of ions per cubic centimeter, and D_β is the self‐diffusion coefficient of the ion.