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-3

There is also an extra electrostatic force of repulsion between two SiCl4 molecules due to development of more partial negative charge on Cl atoms due to more EN difference between Cl and Si compared with Cl and C two similar charges repel so net electrostatic force of attraction decreases in SiCl4.

0

I start from the expression $$\ce{U = - Ar^{-2} + Br^{-10}} ............. (1)$$ If this expression ($1$) is derived with respect to r, it gives ($2$) $$\ce{0 = -A(-2)·r^{-3} + B(-10)·r^{-11}} ... ........(2)$$ And this can be rearranged to give ($3$) : $$\ce{A = 5B·r^{-8}} ... ........(3)$$ If A from ($3$) is introduced into ($1$), the following ...

9

Mathew Mahindaratne has provided analysis based on experimental values of the boiling points of the two compounds. I would like to offer a different view using bonding analysis. Before I begin tackling the question, we shall first clarify the concept of the hydrogen bond. While the popular view of the hydrogen bond is as a particularly strong type of "...

9

The boiling point of non-ionic compounds are highly depend on their H-bonding abilities. For example, boiling point of water (molar mass: $\pu{18.02 g/mol}$) is $\pu{100 ^\circ C}$ at $\pu{1 atm}$ while that of ethanol (molar mass: $\pu{46.07 g/mol}$) is $\pu{78.4 ^\circ C}$ at $\pu{1 atm}$, even though ethanol is heavier and have more other intermolecular ...

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