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IMF Strength Explorer — Boiling Points vs. IMF Type

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How to Use

  1. Hover or click on any bar to view boiling point data and update the info panel.
  2. Use the IMF filter dropdown (Show All, London Dispersion Only, Dipole-Dipole, Hydrogen Bonding) to focus on a category.
  3. The dashed horizontal line marks 0 °C; compare groups to see how IMF type affects boiling point.
  4. The right info panel explains each molecule’s IMF type, molar mass, and why its boiling point is high or low.
  5. Use the color legend to quickly identify IMF categories: gray (dispersion), blue (dipole), red (hydrogen bonding).

Classroom Ideas

  • Trend Discussion: Filter to hydrogen bonding to highlight why H₂O boils dramatically higher than similar-mass molecules.
  • Scale Comparison: Compare CH₄ vs C₄H₁₀ vs I₂ to show how increasing molar mass strengthens dispersion forces.
  • Quick Check: Ask students to predict the IMF type before revealing the filter or info panel for each molecule.

Educational Context

  • Subject: AP Chemistry — Intermolecular Forces and Liquids
  • Grade Level: 11–12
  • Learning Objectives:
  • Analyze how different IMF types influence boiling points.
  • Differentiate between dispersion, dipole-dipole, and hydrogen bonding strength.
  • Duration: 8–10 minutes as a guided comparison or station activity.
  • Prerequisites: Polarity, electronegativity, hydrogen bonding criteria.
  • Assessment Idea: Have students explain why SO₂ has a higher boiling point than HCl using the MicroSim data.