Chemistry A-Level
branching and contact area
What branching and contact area means in Chemistry A-Level, as defined for AQA.
Definition of branching and contact area
Check what you remember
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Reference: AQA
Where the same force operates in both substances, compare the surface area in contact, so a longer unbranched chain boils higher than a shorter or more branched isomer with the same formula.
Topics that use branching and contact area
- Forces between molecules (AQA A-Level)
Related terms
- anomalous boiling points
- comparing force strengths
- electronegativity of the donor atom
- four hydrogen bonds per water molecule
- hydrogen bonding
- induced dipole-dipole forces
- open lattice in ice
- permanent dipole-dipole forces
Using branching and contact area in the exam
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