Convert ethanol into ethene using:

(a) solid dehydrating agent

(b) hot conc. H₂SO₄?

Give only balanced equations.

(a) Using Al₂O₃ as dehydrating agent.

$\underset{\text{ ethyl alcohol}}{\text{C}$2\text{H}5\text{OH}} \xrightarrow[350\degree\text{C}]{\text{Al}2\text{O}3} \underset{ \text{ethene}}{\text{C}2\text{H}4} + \text{H}_2\text{O}\

(b) Using hot conc. H₂SO₄

$\underset{\text{ ethyl alcohol}}{\text{C}$2\text{H}5\text{OH}} \xrightarrow[170\degree\text{C}]{\text{Conc. H}2\text{SO}4\text{[excess]}} \underset{ \text{ethene}}{\text{C}2\text{H}4} + \text{H}_2\text{O}\