Question

alkene + water $\stackrel{\mathrm{H}_3 \mathrm{SO}_3}{\rightleftharpoons}$ alcohol + heat In simplistic terms, it can be thought that an equilibrium exists in the hydration-dehydration reactions above. Use LeChatelier's principle to explain why the dehydration reaction is favored at $180^{\circ} \mathrm{C}$.

Name: Problem 87, Chapter 13: Chemistry for Today: General, Organic, and Biochemistry
Uploaded: 2021-11-02T04:19:30-08:00
Duration: 2 min 5 s
Channel: Ronald Prasad
Description: alkene + water H3 SO3⇌ alcohol + heat In simplistic terms, it can be thought that an equilibrium exists in the hydration-dehydration reactions above. Use LeChatelier's principle to explain why the dehydration reaction is favored at 180^∘ C.

   alkene + water $\stackrel{\mathrm{H}_3 \mathrm{SO}_3}{\rightleftharpoons}$ alcohol + heat

In simplistic terms, it can be thought that an equilibrium exists in the hydration-dehydration reactions above. Use LeChatelier's principle to explain why the dehydration reaction is favored at $180^{\circ} \mathrm{C}$.

Chemistry for Today: General, Organic, and Biochemistry

Spencer L. Seager,… 10th Edition

Chapter 13, Problem 87

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Solved by Expert Ronald Prasad

11/02/2021

Step 1

The given reaction involves an alkene reacting with water in the presence of sulfuric acid ($\mathrm{H}_3\mathrm{SO}_3$) to form an alcohol. This reaction can also proceed in the reverse direction, where the alcohol can dehydrate to regenerate the alkene and Show more…

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alkene + water $\stackrel{\mathrm{H}_3 \mathrm{SO}_3}{\rightleftharpoons}$ alcohol + heat In simplistic terms, it can be thought that an equilibrium exists in the hydration-dehydration reactions above. Use LeChatelier's principle to explain why the dehydration reaction is favored at $180^{\circ} \mathrm{C}$.

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Key Concepts

Exothermic Reaction

An exothermic reaction is one that releases heat as it proceeds. In the hydration reaction of an alkene to form an alcohol, heat is released, indicating that the reaction is exothermic. When the temperature is increased, the system responds by favoring the reaction that absorbs heat (the reverse dehydration reaction), in accordance with Le Chatelier's Principle.

Le Chatelier's Principle

This principle states that if an external change is applied to a system at equilibrium, the system adjusts in such a way as to counteract the effect of that change. In the context of temperature changes, if heat is considered as a product in an exothermic reaction, an increase in temperature will shift the equilibrium towards the reactants, thereby favoring the reverse (endothermic) reaction.

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