Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN: 9780078746376
Author: Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher: Glencoe/McGraw-Hill School Pub Co
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Chapter 20, Problem 71A
Interpretation Introduction

Interpretation:

The difference between the oxidation of hydrogen normally and in a fuel cell is to be explained.

Concept introduction:

The oxidation of hydrogen in air occurs with burning of hydrogen gas in air while the oxidation of hydrogen in fuel cell is catalytic oxidation.

Expert Solution & Answer
Check Mark

Answer to Problem 71A

In a fuel cell,  the reaction of hydrogen and oxygen atoms takes place to form water. The process involved the release of electrons and electric current flow through an external circuit whereas when hydrogen is oxidized in air heat energy is released along with the formation of water as a by product; no release of electrons is observed.

Explanation of Solution

Since the burning of hydrogen gas in oxygen is a combustion reaction the release of electrons is not possible but the oxidation of hydrogen in fuel cell is catalyzed therefore the electrons can be removed.

Conclusion

The main difference in the two methods of oxidation is the way in which energy is released. In fuel cell it is electrical energy while in air combustion it is heat energy.

Chapter 20 Solutions

Chemistry: Matter and Change

Ch. 20.1 - Prob. 11SSCCh. 20.1 - Prob. 12SSCCh. 20.1 - Prob. 13SSCCh. 20.1 - Prob. 14SSCCh. 20.2 - Prob. 15SSCCh. 20.2 - Prob. 16SSCCh. 20.2 - Prob. 17SSCCh. 20.2 - Prob. 18SSCCh. 20.2 - Prob. 19SSCCh. 20.2 - Prob. 20SSCCh. 20.2 - Prob. 21SSCCh. 20.3 - Prob. 22SSCCh. 20.3 - Prob. 23SSCCh. 20.3 - Prob. 24SSCCh. 20.3 - Prob. 25SSCCh. 20.3 - Prob. 26SSCCh. 20.3 - Prob. 27SSCCh. 20.3 - Prob. 28SSCCh. 20.3 - Prob. 29SSCCh. 20 - Prob. 30ACh. 20 - Prob. 31ACh. 20 - Prob. 32ACh. 20 - Prob. 33ACh. 20 - Prob. 34ACh. 20 - Prob. 35ACh. 20 - Prob. 36ACh. 20 - Prob. 37ACh. 20 - Prob. 38ACh. 20 - Prob. 39ACh. 20 - Prob. 40ACh. 20 - Prob. 41ACh. 20 - Prob. 42ACh. 20 - Prob. 43ACh. 20 - Prob. 44ACh. 20 - Prob. 45ACh. 20 - Prob. 46ACh. 20 - Prob. 47ACh. 20 - Prob. 48ACh. 20 - Prob. 49ACh. 20 - Prob. 50ACh. 20 - Prob. 51ACh. 20 - Prob. 52ACh. 20 - Prob. 53ACh. 20 - Prob. 54ACh. 20 - Prob. 55ACh. 20 - Prob. 56ACh. 20 - Prob. 57ACh. 20 - Prob. 58ACh. 20 - Prob. 59ACh. 20 - Prob. 60ACh. 20 - Prob. 61ACh. 20 - Prob. 62ACh. 20 - Prob. 63ACh. 20 - Prob. 64ACh. 20 - Prob. 65ACh. 20 - Prob. 66ACh. 20 - Prob. 67ACh. 20 - Prob. 68ACh. 20 - Prob. 69ACh. 20 - Prob. 70ACh. 20 - Prob. 71ACh. 20 - Prob. 72ACh. 20 - Prob. 73ACh. 20 - Prob. 74ACh. 20 - Prob. 75ACh. 20 - Prob. 76ACh. 20 - Prob. 77ACh. 20 - Prob. 78ACh. 20 - Prob. 79ACh. 20 - Prob. 80ACh. 20 - Prob. 81ACh. 20 - Prob. 82ACh. 20 - Prob. 83ACh. 20 - Prob. 84ACh. 20 - Prob. 85ACh. 20 - Prob. 86ACh. 20 - Prob. 87ACh. 20 - Prob. 88ACh. 20 - Prob. 89ACh. 20 - Prob. 90ACh. 20 - Prob. 91ACh. 20 - Prob. 92ACh. 20 - Prob. 93ACh. 20 - Prob. 94ACh. 20 - Prob. 95ACh. 20 - Prob. 96ACh. 20 - Prob. 97ACh. 20 - Prob. 98ACh. 20 - Prob. 1STPCh. 20 - Prob. 2STPCh. 20 - Prob. 3STPCh. 20 - Prob. 4STPCh. 20 - Prob. 5STPCh. 20 - Prob. 6STPCh. 20 - Prob. 7STPCh. 20 - Prob. 8STPCh. 20 - Prob. 9STPCh. 20 - Prob. 10STPCh. 20 - Prob. 11STPCh. 20 - Prob. 12STPCh. 20 - Prob. 13STPCh. 20 - Prob. 14STPCh. 20 - Prob. 15STP
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