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Asked in Premeth Test 10 — Gases

For a non-zero value of the force of attraction between gas molecules, the gas equation will be:

Correct answer: A. PV = nRT - n²A / V

  • A. PV = nRT - n²A / V
  • B. PV = nRT + nbP
  • C. P = nRT / V - b
  • D. PV = nRT

Explanation

The van der Waals equation modifies the ideal gas law for real gases. The term 'a' corrects for the intermolecular forces of attraction, and since these forces are non-zero, the pressure correction term (P + an²/V²) must be included.

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About Gases

Gas behaviour is explained through the kinetic molecular theory and the relationships among pressure, volume and temperature. Work includes STP, Boyle's and Charles's laws, absolute zero, the ideal gas equation, and the distinction between ideal and real gases, especially the effects of intermolecular forces and molecular volume.

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