I knew two chemical reactions of alcohol with sulfuric acid
$\ce{CH3CH2OH + H2SO4 -> CH2CH2}$
Here product is having a double bond (ethene) and this reaction happens at 443 K temperature.$\ce{CH3CH2OH + H2SO4 -> C2H5OC2H5}$
Here product is ether an happens at 413 K temperature.
But today I came across another reaction.
- $\ce{C2H5OH + H2SO4 -> C2H5OSO2OH + H2O}$
Now my question is when will this third reaction happen? Any specific temperature?
The book from which I found this reaction doesn't describe anything. Just says: Alcohols react with inorganic acids (except halogen acids) to form inorganic esters.