Question

Consider the following two thiols: C3H7SH (1-propanethiol) C2H5SH (ethanethiol) (a) Which would have the higher boiling...

Consider the following two thiols:

C3H7SH (1-propanethiol)
C2H5SH (ethanethiol)
(a) Which would have the higher boiling point? _________(1-propanethiol or ethanethiol)
(b) Which would have the larger enthalpy of vaporization? _________(1-propanethiol or ethanethiol)


(c) The differences in (a) and (b) are due to _________(dispersion forces, dipole-dipole forces or hydrogen bonding.)

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Answer #1

(a) Which would have the higher boiling point? _________(1-propanethiol or ethanethiol)

since it is heavier, therefore, requires much more energy to break interactions

(b) Which would have the larger enthalpy of vaporization? _________(1-propanethiol or ethanethiol)

since it has much more mass, thereofre, requires more energy to break interaction in the intermolecular level

(c) The differences in (a) and (b) are due to _________(dispersion forces, dipole-dipole forces or hydrogen bonding.)

mostly due to dispersion forces, since dipole and h-bonding are very simliar

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