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AP Chemistry 3.3.A: Solids, Liquids, and Gases

Explore AP Chemistry 3.3.A questions on representing solid, liquid, and gas phases with particulate models showing spacing, motion, and interactions.

Syllabus
Effective Fall 2025
Course
AP Chemistry

Exam points

  • Explain how covalent bonding and molecular geometry arise from electron sharing and repulsion.
  • Apply Lewis structures, resonance and formal charge to predict molecular shape, polarity and bonding.

3.3.A—Represent the differences between solid, liquid, and gas phases using a particulatelevel model question 1

[Maximum number: 1]

A scientist is investigating the properties of a mixture of CH3OH\mathrm{CH}_{3} \mathrm{OH} and H2CO\mathrm{H}_{2} \mathrm{CO}. The scientist

generates the following diagram to represent the mixture.

Figure for Question 3.3.A—Represent the differences between solid, liquid, and gas phases using a particulatelevel model question 1 — AP Chemistry
Figure for Question 3.3.A—Represent the differences between solid, liquid, and gas phases using a particulatelevel model question 1 — AP Chemistry
Figure for Question 3.3.A—Represent the differences between solid, liquid, and gas phases using a particulatelevel model question 1 — AP Chemistry
Figure for Question 3.3.A—Represent the differences between solid, liquid, and gas phases using a particulatelevel model question 1 — AP Chemistry
Figure for Question 3.3.A—Represent the differences between solid, liquid, and gas phases using a particulatelevel model question 1 — AP Chemistry

The scientist plans to cool a gaseous mixture of CH3OH\mathrm{CH}_{3} \mathrm{OH} and H2CO\mathrm{H}_{2} \mathrm{CO} to form a liquid mixture

and finds data on the two compounds. The data are summarized in the table.

Table for Question 3.3.A—Represent the differences between solid, liquid, and gas phases using a particulatelevel model question 1 — AP Chemistry

Propose a temperature to which the mixture should be cooled such that CH3OH\mathrm{CH}_{3} \mathrm{OH} and

H2CO\mathrm{H}_{2} \mathrm{CO} will both be liquids.

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