Heating ethanol at 443 K with excess concentrated sulphuric acid results in the dehydration of ethanol to give __________

Heating ethanol at 443 K with excess concentrated sulphuric acid results in the dehydration of ethanol to give ethene. The concentrated sulphuric acid can be regarded as a dehydrating agent which removes water from ethanol.

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH} \stackrel{\mathrm{Hot} \mathrm{conc} {\mathrm{H}}_2{\mathrm{SO}}_4}{\to } {\mathrm{CH}}_2={\mathrm{CH}}_2 +{\mathrm{H}}_2\mathrm{O}$