Which statement correctly describes the thermodynamics of the dehydration of alcohols with concentrated sulphuric acid?

It is highly endothermic since the cleavage of

C - H

and

C - O H

bonds require more energy than is gained by forming the

C = C

double bond and water

No worries! We‘ve got your back. Try BYJU‘S free classes today!

It is highly exothermic since the cleavage of

C - H

and

C - O H

bonds require less energy than is gained by forming the

C = C

double bond and water

No worries! We‘ve got your back. Try BYJU‘S free classes today!

The dehydration is exothermic and the waters reaction with the concentrated acid also exothermic

No worries! We‘ve got your back. Try BYJU‘S free classes today!

The dehydration is endothermic and the waters reaction with the concentrated acid also exothermic

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D The dehydration is endothermic and the waters reaction with the concentrated acid also exothermic
A dehydration reaction is usually defined as a chemical reaction that involves the loss of a water molecule from alcohol.
Removal of water molecule requires heat so it is endothermic reaction.
The reaction is driven by the strongly exothermic reaction as sulfuric acid reacts with water, which produces dangerous sulfuric-acid containing steam.

Suggest Corrections

Similar questions

H_{2} S O_{4}

C H_{4} + O_{2} \to C O_{2} + H_{2} O

C - H

Consider the following chemical equation for the combustion of methane ( $C H_{4}$ )

$C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$

Join BYJU'S Learning Program