InterviewSolution
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InterviewSolution
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Positive deviation from ideal behaviour takes place because ofA. finite size of atoms and `pV//nRT lt 1`B. molecular interaction between atoms and `pV//nRT gt 1`C. finite size of atoms and `pV//nRT gt 1`D. molecular interaction between atoms and `pV//nRT lt 1` |
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Answer» Correct Answer - C According to the van der Waals equation , we have `(p + (an^(2))/(V^(2))) (V - nb) = nRT` When molecular interaction (i.e., attraction ) is insignificant , then the `an^(2)//V^(2)` may be neglaected relative to `p` to give `p(V - nb) = RT` or `pV - npb = nRT` or `pV = nRT + npb` Dividing both sides by `nRT` , we have `(pV)/(nRT) = 1 + npb` Thus , `pV//nRT gt 1` This happens whenn the factor `b` which measures the size of particles is significiant. |
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