Aqueous solutions of isopropyl alcohol are commonly sold as rubbing alcohol. The boiling point of isopropyl alcohol is 82.4 °C.
It evaporates readily from the surface of the skin. Ethylene glycol (CH2OHCH2OH) is sold as antifreeze/antiboil. The boiling point of ethylene glycol is 198 °C. The molecular masses of isopropyl alcohol and ethylene glycol are similar. Provide an explanation for the observed difference in their boiling points.
This is due to more hydrogen bonding in ethylene glycol than it is in isopropyl alcohol
Explanation:
The boiling point of isopropyl alcohol is 82.4 °C it contains only a single OH group, hence intermolecular hydrogen bonding is solely responsible for it's boiling point, whereas Ethylene glycol (CH2OHCH2OH) contains 2-OH group and both intermolecular and intramolecular hydrogen bonding are responsible for the higher boiling point of ethylene glycol at 198 °C.
