Chemistry · GCSE · Organic Chemistry
Hydrocarbon properties and molecule size
gcse-chem-5-7-1-3aFree2:36Heddy Score 2 of 7, below the standardPlays from youtube-nocookie.com. No YouTube cookies until you press play.
What you need to know
- Longer hydrocarbon chains are more viscous.
- Shorter chains are more flammable.
- Boiling point rises as the molecules get bigger.
In this clip
0:00–2:36Hydrocarbon properties and molecule sizegcse-chem-5-7-1-3aHeddy ScoreSeven checks every clip must pass before students see it: trusted, on the map, accurate, focused, accessible, safe, and proven by students.2/7, Below the standard
- Trusted source · passed. The creator's own upload, live and playable here.
- On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
- Spec-true · not judged yet. Accurate, and right for the current UK specification.
- Focused · passed. One idea, short enough to watch in one go.
- Accessible · failed. Good captions, clear sound and pictures.
- Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
- Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
Our students
How the Heddy Score worksNot enough students yet
Our own students' answers. These are what move ★7 Proven.Why we picked it
Short GCSE lesson on how hydrocarbon properties change with molecule size.
Freesciencelessons on YouTubechecked 2026-10-16