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Dr. Lavelle's examples in class were H2O and H2S. H2O has a higher melting point at 0°C and higher boiling point at 100°C compared to H2S which has a melting point of -80°C and boiling point of -60°C. Since H2O has hydrogen bonds, the melting point and boiling point increase.
BenJohnson1C wrote:Why can it only occur with N O and F?
Hydrogen bonding only occurs with N O F because these are very electronegative elements. N O F have more electron pulling power, creating a partial positive on the hydrogen and a partial negative on N O F. The electrostatic attraction between H and N O F is stronger than regular London dispersion forces.
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