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Chemistry / Principles of General Chemistry 2 / Chapter 9 / Problem 39P

Principles of General Chemistry | 2nd Edition | ISBN: 9780073511085 | Authors: Martin S. Silberberg

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Sports trainers treat sprains and soreness with ethyl

Chapter 9, Problem 39P

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QUESTION:

Sports trainers treat sprains and soreness with ethyl bromide. It is manufactured by reacting ethylene with hydrogen bromide:

Use bond energies to find the enthalpy change for this reaction.

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QUESTION:

Sports trainers treat sprains and soreness with ethyl bromide. It is manufactured by reacting ethylene with hydrogen bromide:

Use bond energies to find the enthalpy change for this reaction.

ANSWER:

Solution 39P

Here we have to use bond energies to calculate the heat of reaction:

Step 1

In order to calculate heat of reaction by using bond energies, we have to add the energy required to break all the bonds in the reactants to the energy released to form all bonds in the product. Since the formation of bond is an exothermic reaction, energy of the bond form is always -ve (amount of energy release).

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