If 0.00531 mol n2o effuses through an orifice in a certain period of time, how many moles of n2o3 would effuse in the same time under the same conditions?

Answer : The number of moles of effused at same condition are 0.00404 moles.

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 gas

= rate of effusion of gas

= molar mass of gas  = 44 g/mole

= molar mass of gas = 76 g/mole

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

Thus, the rate of effusion of is 0.76 times of the rate of effusion of

Number of moles of effused = 0.00531 mol

Number of moles of effused at same condition =

Number of moles of effused at same condition =

Therefore, the number of moles of effused at same condition are 0.00404 moles.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

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