Elemental Success by Jupiter Luna · AP Chemistry · Topic 2.2
Drag two atoms toward each other and watch the potential-energy curve draw itself. Find the bond length, read the bond energy, break and re-form the bond, compare bonds, and score a sketch the way an AP reader would.
| # | Bond | r (pm) | PE (kJ/mol) | Net force | Region |
|---|---|---|---|---|---|
| Move the atoms, then press Record this point. Record far apart, near the minimum, and too close. | |||||
Start far apart. Bring two H atoms together slowly and record PE at 300, 150, 74 and 50 pm. Where is PE lowest? What happens if you push past it?
Predict, then pull H₂ apart and watch the energy counter. Then let the atoms fall back. Compare the two numbers.
Compare H–F with H–I, then C–C with C≡C. For each pair: which minimum sits farther left, and which well is deeper? Then check F–F against Cl–Cl.
Given one curve, place the minimum of a new one. Two points: bond length within ±10 pm, depth within ±20 kJ/mol. Get three in a row.
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