A-LevelChemistryStates of matter9701/12 · Feb/Mar 2017 · Q41 Mark
The boiling points of methane, ethane, propane and butane are given. compound CH4 boiling point/K 112 compound CH3CH3 boiling point/K 185 compound CH3CH2CH3 boiling point/K 231 compound CH3CH2CH2CH3 boiling point/K 273 Which statement explains the increase in boiling point from methane to butane?
ACloser packing of molecules results in stronger van der Waals' forces.
BMore covalent bonds are present and therefore more energy is required to break the bonds.
CMore electrons in the molecules results in stronger van der Waals' forces.
DMore hydrogen atoms in the molecules results in stronger hydrogen bonding.
✓ Correct answer
C: More electrons in the molecules results in stronger van der Waals' forces.
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