Arrange the following molecules in order of increasing molar enthalpy of vaporization:CCl4, SiCl4, CH4, SiBr4 Why is SiBr4 < CCl4 but CCl4 < SiBr4 ? I understand that the bond length for CCl4 is stronger than the bond length for SiBr4 so why wouldn't the bond length for SiBr4 be weaker than CCl4 ?

Answered: Arrange the following molecules in…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter9: Liquids, Solids, And Materials

Section: Chapter Questions

Problem 63QRT

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Arrange the following molecules in order of increasing molar enthalpy of vaporization:

CCl_4,SiCl_4,CH_4,SiBr₄

Why is SiBr₄< CCl₄but CCl₄< SiBr₄ ?

I understand that the bond length for CCl₄is stronger than the bond length for SiBr₄so why wouldn't the bond length for SiBr₄be weaker than CCl₄?

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This question is related to molar enthalpy of vaporization which can be defined as the amount of energy required to convert one mole of substance from its liquid to vapour state at constant pressure and temperature.

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