. Ère-Étape, On remplit la cellule et la réserve à la pression P initiale . V 0 , V 1 et V 2 sont à la température T 0 (azote) Le long du volume V 3 , la température varie de T 0 à la température T 1 du scellement. Nous admettrons pour simplifier que cette variation est linéaire, p.1

. Au-centre, T 3 en haut, et T 2 en bas. V 2 et V 3 sont à la température T 3 . La pression vaut P inter

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