Which gas will effuse at the rate closest at a particular pressure and temperature, nitrogen gas effuses at the rate of 79mls. using the same apparatus at the same temperature and pressure, at what rate will sulfur dioxide effuse? to that of o2?

Answer : The rate of effusion of sulfur dioxide gas is 52 mL/s.

Solution :

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.

or,

      ..........(1)

where,

= rate of effusion of nitrogen gas =

= rate of effusion of sulfur dioxide gas = ?

= molar mass of nitrogen gas  = 28 g/mole

= molar mass of sulfur dioxide gas = 64 g/mole

Now put all the given values in the above formula 1, we get:

Therefore, the rate of effusion of sulfur dioxide gas is 52 mL/s.

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