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AP Chemistry 3.6 A Explain the Relationship Among Non Ideal Behaviors of Gases Interparticle Forces and or Volumes Questions

Explore AP Chemistry 3.6.A questions on why real gases deviate from ideal behavior because of interparticle attractions and particle volume.

Syllabus
Effective Fall 2025
Course
AP Chemistry

Exam points

  • Explain how acid-base equilibria depend on dissociation, conjugate pairs and solution conditions.
  • Apply equilibrium constants and buffer relationships to calculate pH and predict acid-base changes.

AP Chemistry 3.6 A Explain the Relationship Among Non Ideal Behaviors of Gases Interparticle Forces and or Volumes Questions question 1

[Maximum number: 1]

A student investigates gas behavior using a rigid cylinder with a movable piston of negligible mass, as shown in the diagram above. The cylinder contains 0.325 mol of O2(g)\mathrm{O}_{2}(g).

The student further cools the cylinder to −180∘C-180^{\circ} \mathrm{C} and observes that the measured volume of the O2(g)\mathrm{O}_{2}(g) is substantially smaller than the volume that is calculated using the ideal gas law. Assume all equipment is functioning properly. Explain why the measured volume of the O2(g)\mathrm{O}_{2}(g) is smaller than the calculated volume. (The boiling point of O2(l)\mathrm{O}_{2}(l) is −183∘C-183^{\circ} \mathrm{C}.)

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