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Convection and thermal diffusion in a solution heated from below II. the system CHBr2·CHBr2 - CHCl2·CHCl2

par Legros, Jean Claude ;Van Hook, Alexander;Thomaes, Georges
Référence Chemical physics letters, 2, 4, page (249-250)
Publication Publié, 1968-08

Article révisé par les pairs

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Résumé :

The critical point for the onset of convection (Bénard point) was determined for the system CHBr2·CHBr2 - CHCl2·CHCl2. No stabilizing effect was observed. Experiments which sampled this and a conventional thermal diffusion cell (cf. following letter) to directly measure the concentration gradient due to thermal diffusion revealed that the gradient was destroyed when the solution is heated from below. This is an unexpected and important observation. © 1968.