Molecules from an equimolar mixture of gaseous silane, SiH₄, and helium, He, escape through effusion through a small hole in a cylinder. Calculate the rate of effusion of the silane molecules relative to the helium atoms.

Question

Quizplus · Accepted Answer

The rate of effusion is inversely proportional to the square root of the molar mass of the gas. The molar mass of SiH4 is 32.1 g/mol and that of He is 4.0 g/mol. The relative rate of effusion of SiH4 to He is √(4.0/32.1) = 0.353.

Molecules from an Equimolar Mixture of Gaseous Silane, SiH4, and Helium

Molecules from an Equimolar Mixture of Gaseous Silane, SiH₄, and Helium