Asked in KMU MDCAT 2023 (retake) 2023Moderate

Increasing the compressibility of a gas (Z) decreases its.

Correct answer: B. Volume

  • A. Pressure
  • B. Volume
  • C. Temperature
  • D. Concentration

Explanation

The compressibility factor (Z) is a measure of how much a gas deviates from ideal gas behavior. A higher compressibility factor indicates that the gas is more compressible, meaning it can be compressed to a smaller volume than an ideal gas under the same conditions.Increasing the compressibility of a gas (Z) means that the gas can be compressed to a smaller volume, which decreases its volume (b).

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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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