Order the following according to increasing rate of effusion:
F₂, Cl₂, NO, NO₂, CH₄

Question

Order the following according to increasing rate of effusion: F₂, Cl₂, NO, NO₂, CH₄

Quizplus · Accepted Answer

The rate of effusion is inversely proportional to the square root of the molar mass of the gas. Therefore, the gases with the lowest molar mass will have the highest rate of effusion. The ordered molar masses of the gases are: NO (30 g/mol) < NO₂ (46 g/mol) < F₂ (58.5 g/mol) < Cl₂ (71 g/mol) < CH₄ (104 g/mol) Hence, the increasing order of rate of effusion is Cl₂ < NO₂ < F₂ < NO < CH₄, and the correct choice is C.

Order the Following According to Increasing Rate of Effusion