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Why does neopentane boil lower (282.7 K) than n-pentane (309.4 K)?
ACompact shape weakens dispersion forces
BIt has fewer atoms per molecule
CIt forms hydrogen bonds with itself
DIt has a higher dipole moment
Answer & Solution
Correct answer: A. Compact shape weakens dispersion forces
Both are C5H12, but the spherical neopentane has less surface contact, so its dispersion forces are weaker.
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