Question

Compute the relative rate of diffusion of helium to argon

Answer 1

Answer: The relative rate of diffusion of helium to argon is
`√(10)`

Step-by-step explanation:

To calculate the rate of diffusion of gas, we use Graham's Law.

This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows:

`\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}`

Molar mass of helium = 4 g/mol

Molar mass of argon = 40g/mol

For the rate of diffusion of helium to argon, we write the expression:

`(Rate_(He))/(Rate_(Ar))=\sqrt{(M_(Ar))/(M_(He))}`

`(Rate_(He))/(Rate_(Ar))=\sqrt{(40)/(4)}\\\\(Rate_(He))/(Rate_(Ar))=√(10)`

Hence, the relative rate of diffusion of helium to argon is
`√(10)`