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Calculation of thermodynamic quantities of 3He—4He mixtures from the vapour pressure at temperatures between 1.2 and 1.9°K

✍ Scribed by D.H.N. Wansink

Publisher
Elsevier Science
Year
1957
Weight
606 KB
Volume
23
Category
Article
ISSN
0031-8914

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✦ Synopsis

On the basis of the vapour pressure of 3He--4He mixtures, partly measured directly by S o m m e r s and by W a n s i n k et al. and partly calculated from the osmotic pressure data obtained by W a n s i n k and Taconis, the change of the Gibbs-function of the mixture with concentration has been calculated in the temperature region between 1.2 and 1.9°K at concentrations up to 7% 3He. The entropy, enthalpy and specific heat of mixing are given in comparison with experimental data. The phase separation at low temperatures and the mechanocaloric effect of 3He--4He mixtures are calculated.

*) The liquid concentration is indicated by Xi only when confusion with the vapour concentration Xv might occur is the symbol XL used.

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