Melting point and boiling point

Thread starter Dragosagaragarwal
Start date Oct 8, 2016
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Boiling Boiling point Melting Melting point Point

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The discussion centers on the significant differences in melting points (M.P.) and boiling points (B.P.) of oxygen and sulfur. Oxygen has a melting point of 54K and a boiling point of 90K, while sulfur has a melting point of 393K and a boiling point of 718K. The disparity is attributed to the molecular structure and bonding characteristics of these elements. Oxygen exists as diatomic molecules (O2), which have weaker van der Waals forces compared to sulfur's more complex molecular structure, leading to higher melting and boiling points. The term "polymorphism" is mentioned, indicating that sulfur can exist in multiple structural forms, which contributes to its higher thermal stability and phase change temperatures compared to oxygen.

Oct 8, 2016

Dragosagaragarwal

Why there is huge difference in M.P. and B.P. Of Oxygen (M.P. - 54K,B.P.- 90K) and sulphur (M.P. - 393 K, B.P. - 718 K)

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Oct 8, 2016

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Dragosagaragarwal said:

Why there is huge difference in M.P. and B.P. Of Oxygen (M.P. - 54K,B.P.- 90K) and sulphur (M.P. - 393 K, B.P. - 718 K)

S₆, S₈, S_n>>8 vs. O₂? Google "polymorphism."

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