Question

26. Which compound, chloroacetic acid or iodoacetic
acid, most likely has the lower boiling point, and
why?
(A) Chloroacetic acid, because the London
dispersion forces among its molecules are
weaker
(B) Chloroacetic acid, because the dipole-dipole
forces among its molecules are weaker.
(C) Iodoacetic acid, because the London
dispersion forces among its molecules are
stronger.
(D) Iodoacetic acid, because the dipole-dipole
forces among its molecules are stronger.

Answer 1

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Answer 2

The london dispersion forces are stonger in iodoacetic acid than chloroacetic acid  making chloroacetic acid  to have a lower boiling point.

What are london dispersion forces?

The London forces are forces are intermolecular forces that act on compounds depending on the size of the molecule.

We must note that iodoacetic acid is a larger molecule than chloroacetic acid hence the london dispersion forces are stonger in iodoacetic acid than chloroacetic acid  making chloroacetic acid  to have a lower boiling point.

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