Elements Of Physical Chemistry
Elements Of Physical Chemistry
7th Edition
ISBN: 9780198796701
Author: ATKINS, P. W. (peter William), De Paula, Julio
Publisher: Oxford University Press
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Chapter 10, Problem 10A.1ST
Interpretation Introduction

Interpretation:

The magnitude of the dipole moment and the atom lies at the negative end of the dipole in a C-H bond has to be given.

Concept introduction:

Polar covalent bond involves an unequal sharing of electrons between two bonded atoms; it creates a partial separation of charge and a dipole moment.

Covalent bonds are polar, if there is a difference in electronegativity between the bonded atoms.

Direction of dipole moment in a molecule is can be represented as follows,

Elements Of Physical Chemistry, Chapter 10, Problem 10A.1ST

Expert Solution & Answer
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Explanation of Solution

The given bond is C-H.

The electronegativity of atoms in a bond will be the deciding factor to predict the dipole moment of the bond.

Electronegativities of the atoms in CO are given below:

Hydrogen-2.1Carbon-2.5

Electronegativity difference between atoms in the bond is given below:

CH =2.5 - 2.1 = 0.4

Thus, the dipole moment is 0.4D

Electronegativity of carbon is more than hydrogen. Therefore, the negative end of the dipole lies at more electronegative atom carbon.

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