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the melting points of sodium chloride is more than that of sodium.why?

the melting points of sodium chloride is more than that of sodium.why?

Grade:11

2 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
7 years ago
Sulphur has a melting point (when goes solid to liquid) and boiling point (liquid to gas) higher than room temperature (25 degrees Celcius). Oxygen however has a melting and boiling point below room temperature, and thus exists as a gas.

The difference in boiling points is due to differing forces existing between the two. Stronger forces exist within the sulphur atoms (ie. they are holding the sulphur atoms together more) compared to the forces present within oxygen molecules.
Sunil Kumar FP
askIITians Faculty 183 Points
7 years ago
Sorry wrong answer posted for the above .Here is the right explanation.
Reason-
sodium chloride is аn ionic compound whith crystal lattice,where sodium charged
+ and chlorine - . Energy(in heat form) which is need to melt NaCl is higher
than for Na,as a result of various properties of lattices.

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