Question

why ethanol has higher boiling point than Ethane?

Answer 1

the –OH group has the effect of strengthening the intermolecular forces.

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Answer 2

Ethanol has higher boiling point than ethane

• Ethane is a saturated hydrocarbon which is composed of only hydrogen and carbon.
• On the other hand, Ethanol is alcohol composed of carbon, hydrogen, and oxygen due to the presence of OH as a functional group.
• The boiling point of ethane is -89° C, whereas for ethanol it is 78.73°C.
• The main reason behind this variation in the boiling point is that, in the case of ethane, the atoms are attached by weak Vanderwal's force.
• On the other hand, in the case of ethanol the functional group OH is attached to the main chain through strong hydrogen bonding.
• If the inter molecular forces are less, temperature required for bond dissociation is less and therefore boiling point will be less.
• when it is more, temperature required for bond dissociation will be more, thus the boiling point will be more.

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