Question

Which statement best explains why water has a higher boiling point than ethane?
Ethane molecules are smaller than water and can move faster.
Water molecules need relatively less heat energy to move.
Water molecules form hydrogen bonds, which cannot be broken by heating water.
Ethane molecules have no hydrogen bonds and need less energy to separate.

Answer 1

Answer:

Ethane molecules have no hydrogen bonds and need less energy to separate.

Explanation:

Ethane: has no hydrogen bonding, it has low melting, boiling points, and is a gas at room temperature.

Water: has strong hydrogen bonding between H and O, has relatively high melting and boiling points.

Answer 2

Statement that explains the relationship between boiling point of water and ethane and how the boiling point of water is higher than ethane is D:Ethane molecules have no hydrogen bonds and need less energy to separate.

• The boiling point of water is usually high compare to that of ethane because of the hydrogen bonds present in water which is a electromagnetic attraction between hydrogen atom  electronegative atom of Oxygen.

• And which this requires so much energy to break unlike ethane that doesn't contain any hydrogen bond.

Therefore, option D is correct.

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