Die Wärmeleitfähigkeiten von reinem Para-und Ortho-Wasserstoffgas und ihren Gemischen bei 21 °K

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Abstract
Measurements on gases at 21 °K in the whole concentration range from pure p-H2 to pure o-H2 result in the equation λ/λp = 1-3.61·10-3γ-5.66·10-3y2. λ and λ are the thermal conductivity coefficients of a mixture with the molar fraction γ of o-H2 and of pure p-H2 respectively. Existing theories assuming a spherical interaction potential can account for only about half the differences in thermal conductivities found experimentally.