Given neon, water, sodium chloride, and methanol, how would the intermolecular forces of attraction compare? How would we assess the strength of intermolecular interaction?

Md Ariful Islam

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Of the molecular compounds, clearly water has the strongest intermolecular force, by reason of strong intermolecular hydrogen . And this can be assessed by examining the normal boiling points of the three substances: $100$ $""^@C$; $64.7$ $""^@C$; $-246.1$ $""^@C$. Which boiling point corresponds to which substance?

On the other hand, non-molecular sodium chloride would have a boiling point so high as to be almost unmeasurable. Why? Because melting and boiling requires enuff energy to overcome the STRONG electrostatic bonds that persist over the entire lattice.

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