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devilsadvocate
Lv 4
devilsadvocate asked in Science & MathematicsChemistry · 10 years ago

Which has the highest boiling point and how do you know?

N2

LiF

NH3

CH4

1 Answer

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  • GeorgeSiO2
    Lv 7
    10 years ago
    Favorite Answer

    LiF has an extended 3D ionic lattice held together by strong forces and hence has a high mp. I think its mp is ~850°C (google lithium fluoride).

    The others are molecular solids held together by weak van der Waals forces (also H bonding for NH3) so mp < RT. N2: -196°C; NH3 -33°C; CH4 -160°C (double check these mps)

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