${\mathrm{CH}}_3\mathrm{COOH}+{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\underset{\mathrm{heat}}{\overset{\mathrm{Conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}{\mathrm{CH}}_3{\mathrm{COOC}}_2{\mathrm{H}}_5+{\mathrm{H}}_2\mathrm{O}$ The above reaction is known as

Esterification reaction is a reaction where, one mole of alcohol and one mole of carboxylic acid react in acidic medium and form ester, which is confirmed by sweet smell.