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Explain the physical significance of Van der Waal's parameters. |
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Answer» (i) Van der Waal's constant 'a': Its value is a measure of the magnitude of the attractive forces among the molecules of the gas. Greater the value of 'a', larger are the inter-molecular forces of attraction. (ii) Van der Waal's constant 'b': Its value is a measure of the effective size of the gas molecules. Its value is equal to four times the actual volume of the gas molecules. It is called excluded volume or co-volume. |
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