SME
General Chemistry I · Problem type
Boiling points: lowest to highest
Use this for “Rank CH₄, H₂O, HCl and He by normal boiling point, lowest first.”
Put in order
Order by normal boiling point, lowest first.
1
?
2
?
3
?
4
?
5
?
6
?
Assumptions
•
A liquid boils when its molecules can pull apart, so the stronger the forces between them, the higher the boiling point.
•
Larger molecules have more electrons, which shift more easily, so their London forces are stronger.
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Hydrogen bonds, from H on N, O or F, raise the boiling point more than size alone; water, with two H and two lone pairs, bonds on all sides.
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