Final answer:
Alcohols can engage in hydrogen bonding with water molecules, which affects their solubility in water. Smaller alcohols with one to three carbon atoms are completely soluble in water due to strong hydrogen bonds. As the length of the carbon chain increases, the solubility of alcohols in water decreases.
Step-by-step explanation:
Alcohols can engage in hydrogen bonding with water molecules. The OH group in alcohols enables the molecules to associate through hydrogen bonding. Smaller alcohols, such as those with one to three carbon atoms, are completely soluble in water because they can form strong hydrogen bonds. However, as the length of the carbon chain in alcohols increases, their solubility in water decreases.