How is ethene prepared from ethanol? Give the reaction involved in it.

(N/A) Ethanol,when heated with excess concentrated sulphuric acid $(H_{2}SO_{4})$ at $443\, K$,undergoes dehydration to produce ethene.
The chemical reaction is as follows:
$CH_{3}CH_{2}OH \xrightarrow[443\, K]{\text{Hot conc. } H_{2}SO_{4}} CH_{2}=CH_{2} + H_{2}O$