What is the boiling point of formic acid? Why is the boiling point of formic acid higher than that of ethanol?

Image: Formic acid structural formula

Formic acid (chemical formula HCOOH, molecular formula CH2O2, molecular weight 46.03), commonly known as formic acid, is the simplest carboxylic acid. Colorless and pungent odor of the liquid. Weak electrolyte, melting point 8.6 ℃, boiling point 100.8 ℃. Very acidic, corrosive, can stimulate the skin blistering. Found in the secretions of bees, certain ants and caterpillars. Is an organic chemical raw material, also used as a disinfectant and preservative.

The boiling point belongs to physical properties. Formic acid and ethanol are both molecular crystals, which are determined by the force between molecules. They follow the laws of molecular crystals. Due to the stronger hydrogen bonds in formic acid, their boiling points are relatively high.

The principles to be followed are as follows:
1. First compare whether there are hydrogen bonds. Those with hydrogen bonds are generally higher
2. Compare the molecular mass again, that is, van der Waals force
3. Finally, than the branch chain. The more branches, the lower the boiling point