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volume de gaz dissous


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Posted

bonjour, 

je ne comprends pas la démarche à avoir pour résoudre la B et la C, quelqu'un peut-il m'expliquer? les réponses sont BCD

 

merci d'avance pour vos réponses !

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  • Solution
Posted (edited)

Salut,

Pour la B : V = S x P.

P = 0.07 x 0.35 car l'ai est constitué de 7% d'O2

0.07 x 0.35 x 20 = 0.49~0.5

 

Pour la C, si on diminue d'altitude la pression sera plus grande et le volume de gaz dissout aussi.

 

Bonne journée

Edited by Papa_Dragon

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