- have higher melting and boiling points compared to the alcohols and hydrocarbons with the Same number of carbons
- carboxylic acids show a gradual trend in boiling points.
- boiling points increase as the molecular size increases.
| Carboxylic Acid | Boiling Point |
|---|---|
| methanoic acid | 101 |
| ethanoic acid | 118 |
| propanoic acid | 141 |
| butanoic acid | 164 |