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Chapter 7: Q85 E (page 402)

Explain why the \({\rm{HOH}}\) molecule is bent, whereas the \({\rm{HBeH}}\) molecule is linear.

Short Answer

Expert verified

The molecule of \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)is bent as it consists of two sets of unpaired electrons whereas molecule of \(HBeH\) is linear as it has only two electrons that can bond.

Step by step solution

01

Concept Introduction

A molecule is a group of two or more than atoms bound by chemical bonds; the term may or may not include ions that meet this condition depending on the context.

02

Bentness of Molecule

\({{\rm{H}}_{\rm{2}}}{\rm{O}}\) molecule has two sets of unpaired electrons and these unpaired electrons forces the bond to be tetrahedral and as a result \({{\rm{H}}_{\rm{2}}}{\rm{O}}\) molecule is bent.

\(Be\) element has only two electrons to form bond with \({\rm{2}}\) hydrogens and in order to avoid repulsion between bonded pairs, they should be far away from each other. As a result, this molecule is linear.

Therefore, \({{\rm{H}}_{\rm{2}}}{\rm{O}}\) molecule is bent whereas \(HBeH\) molecule is not bent.

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Question: Using the standard enthalpy of formation data in Appendix G, calculate the bond energy of the carbon-sulphur double bond in \({\rm{C}}{{\rm{S}}_{\rm{2}}}\).

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