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A flask at room temperature contains exactly equal amounts (in moles) of nitrogen and xenon.?
If a small hole were opened in the flask, which gas would effuse more quickly?
A)nitrogen
B)xenon
C)they would effuse with the same quickness
2 réponses
- pisgahchemistLv 7il y a 7 ans
Would it be helpful to know why lighter molecules effuse more rapidly than heavier molecules?
To compare the rates of effusion, both gases are at the same temperature. Temperature is proportional to the average kinetic energy. Therefore, both gases have the same average kinetic energy.
KE = ½mv²
The mass is inversely proportional to the average speed, that is, the lighter the molecules, the faster they move, and the faster they will effuse through a tiny hole. Nitrogen, with a molar mass of 28.0 g/mol is lighter than Xe, with a molar mass of 131.3 g/mol.
