If it takes 10.6 hours for 1.00 L of nitrogen, N2, to effuse through the pores in a balloon, how long would it take for 1.00 L of chlorine, Cl2, to effuse under the same conditions?

Respuesta :

Answer : The time taken for 1.00 L of chlorine to effuse under the same conditions is, 16.9 hr

Explanation :

According to the Graham's law, the rate of effusion of gas is inversely proportional to the square root of the molar mass of gas.

[tex]R\propto \sqrt{\frac{1}{M}}[/tex]

And the relation between the rate of effusion and volume is :

[tex]R=\frac{V}{t}[/tex]

From this we conclude that,  at constant volume and rate the relation between time and molar mass of gas will be:

[tex]\frac{t_{Cl_2}}{t_{N_2}}=\sqrt{\frac{M_{Cl_2}}{M_{N_2}}}[/tex]

where,

[tex]t_{Cl_2}[/tex] = time of [tex]Cl_2[/tex] = ?

[tex]t_{N_2}[/tex] = time of [tex]N_2[/tex] = 10.6 hr

[tex]M_{Cl_2}[/tex] = molar mass of [tex]Cl_2[/tex] = 71 g/mol

[tex]M_{N_2}[/tex] = molar mass of [tex]N_2[/tex] = 28 g/mol

Now put all the given values in this expression, we get:

[tex]\frac{t_{Cl_2}}{10.6hr}=\sqrt{\frac{71g/mol}{28g/mol}}[/tex]

[tex]t_{Cl_2}=16.9hr[/tex]

Therefore, the time taken for 1.00 L of chlorine to effuse under the same conditions is, 16.9 hr

It will take 16.9 hours for chlorine gas (Cl₂) to effuse under the same condition.

From the question given above, the following data were obtained:

Time for N₂ (t₁) = 10.6 hours

Molar mass of N₂ (M₁) = 2 × 14 = 28 g/mol

Molar mass of Cl₂ (M₂) = 2 × 35.5 = 71 g/mol

Time for Cl₂ (t₂) =?

Using the Graham's law of diffusion, we can obtain the time take for chlorine gas, Cl₂ to effuse as shown below:

[tex]\frac{t_{2}}{t_{1}} = \sqrt{\frac{M_{2}}{M_{1}}} \\\\\frac{t_{2}}{10.6} = \sqrt{\frac{71}{28}}\\\\[/tex]

Cross multiply

[tex]t_{2} = 10.6\sqrt{\frac{71}{28}} \\\\[/tex]

t₂ = 16.9 hours

Therefore, it will take 16.9 hours for Cl₂ to effuse under the same condition.

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