Asked in PMC Practice Test 9 (2021) 2021Moderate

The critical volume of 02 is _ cm3/ mol.

Correct answer: C. 74.42g/dm3

  • A. 95.56g/dm3
  • B. 64.51 g/dm3
  • C. 74.42g/dm3
  • D. 99.9 g/dm3

Explanation

The critical volume of oxygen 74.42 cm3/mol. So the correct answer is C.

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About Real and Ideal Gases

An ideal gas is modelled as particles with negligible volume and no intermolecular attraction, obeying Boyle's, Charles's and Avogadro's laws through PV = nRT. Real gases deviate from this behaviour, especially at high pressure and low temperature, because particle volume and attractive forces matter; the van der Waals equation explains these corrections.

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