Edexcel IAL Chemistry AS 7.5 Intermolecular forces and physical properties
Edexcel IAL Chemistry AS 7.5 Intermolecular forces and physical properties
Compare the strongest attractions first, then use electron number or molecular contact area to predict the order and link stronger forces to more energy required.
How this is tested
- Predict alkane boiling order from chain length, branching and molecular contact area.
- Separate London-force trends down a hydride group from hydrogen-bonding anomalies.
- Compare alcohols with similar-sized molecules by identifying their hydrogen bonding.