Question

Bromine particles are almost twice as heavy as chlorine particles which gas will diffuse faster bromine or chlorine explain your answer

Answer 1

According to Graham’s law of diffusion

Rate of diffusion ∝ 1/√(Molar mass)

From above relation we can say heavier the gas particles faster is its rate of diffusion.

Hence bromine gas will diffuse faster.

Answer 2

Answer : The chlorine gas will diffuse faster than the bromine gas.

Explanation :

According to the Graham's diffusion Law, 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 $Br_2$ = 159.8 g/mol

Molar mass of $Cl_2$ = 71 g/mol

As we know that rate of diffusion of gas is inversely proportional to the square root of the molar mass of the gas. That means higher the molar mass of gas, lower will be the rate of diffusion and vice-versa.

In the given gases, the molar mass of chlorine gas is higher than the bromine gas. So, chlorine gas will diffuse faster than the bromine gas.

Hence, the chlorine gas will diffuse faster than the bromine gas.