Values of the van der Waals\' constants, a and b, are given forfour substances i

Question

Values of the van der Waals' constants, a and b, are given forfour substances in the following table. substance: I, a: 7.33, b: 0.0856 substance: II, a: 11.10,b: 0.0856 substance:III, a: 19.89, b: 0.1317 substance:IV, a: 32.96, b: 0.0675 Which of the four substances has the smallest and which hasthe largest particles? Values of the van der Waals' constants, a and b, are given forfour substances in the following table. substance: I, a: 7.33, b: 0.0856 substance: II, a: 11.10,b: 0.0856 substance:III, a: 19.89, b: 0.1317 substance:IV, a: 32.96, b: 0.0675 Which of the four substances has the smallest and which hasthe largest particles?

Explanation / Answer

In Vander Wall's Equation "a" value indicates the intermolecular forces of attraction.                                          "b" value indicates the the effective volume of thegas. So the size of the particles will depend only on the bvalue. In the given sets of b values b valueis less for the substanceIV , so it will be the smallest particle & substance III is thelargest.

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