Chapter 5, Problem 5.110QP

Interpretation Introduction

Interpretation: The molar mass of the given gas which effuse through a porous barrier in $15$ minutes under given temperature and pressure conditions should be calculated and also the gas should be identified.

Concept Introduction:

The rate of effusion is the number of molecules passing through a porous barrier in a given time. The longer it takes, the slower the rate of effusion.

Using following equation we can find the molar mass of unknown gas.

  $\frac{{\text{r}}_{\text{1}}}{{\text{r}}_{\text{2}}}\text{=}\frac{{\text{t}}_{\text{1}}}{{\text{t}}_{\text{2}}}=\sqrt{\frac{{\text{M}}_{\text{2}}}{{\text{M}}_{\text{1}}}}$