Question

1(a) Effusion refers to the process that gas molecules are escaped from a container through a small pin hole. The rate of escape is determined by their root-room-square speed u_rms. Effusion is used enrich radioactive uranium ²³⁵U from the non-radioactive ²³⁸U element. Explain how this is possible.

(b) If the rate of effusion of A is four times the rate of B, how does the molar mass of A related to molar mass B?

(c ) If an unknown gas molecule is subjected to effuse through a porous barrier in 1.50 min; under the same condition of temperature and pressure, it takes 4.73 min of nitrogen gas (N₂) (with the same volume as unknown gas) to effuse through the barrier. Predict the molar mass of the unknown gas.

Answer 1