Скачать или смотреть 🔥 Alkene Stability Hack: Heat of Hydrogenation SECRET (JEE NEET Score Booster!) 📚 Chemistry Notes

Description:

Hey future doctors and engineers! 😎 Ready to CRUSH organic chemistry? Let's make Heat of Hydrogenation super easy!

What is Heat of Hydrogenation? 🤔
Heat of Hydrogenation is the energy released when hydrogen adds to an alkene's double bond. It's like measuring how much a spring relaxes when you release tension! 🔄 The MORE energy released = LESS stable alkene.

The Stability Rule (Remember this for exams! ✍️)
More substituted alkenes = More stable = LESS heat released during hydrogenation!

Stability order:
Tetra-substituted Tri-substituted Di-substituted Mono-substituted Non-substituted

Example: Comparing these alkenes:

2-Methyl-2-butene (tri-substituted): -126.8 kJ/mol
2-Pentene (di-substituted): -133.0 kJ/mol
1-Pentene (mono-substituted): -136.9 kJ/mol
See the pattern? Less heat = More stable! 💯

Real-life Analogy 🏠
Think of alkenes like houses. A house with more support beams (substitutions) is more stable and needs less energy to maintain. Similarly, alkenes with more alkyl groups need less energy during hydrogenation!

EXAM HACK! 🎯
When NEET/JEE asks about stability based on heat of hydrogenation:

Look for the number of alkyl groups attached to double-bonded carbons
More alkyl groups = More stable = LESS heat released

Questions usually ask to arrange in order of stability or identify the most/least stable

This concept appears EVERY YEAR in some form! Learn it once, score points forever! 🚀

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