Living by Chemistry
2nd Edition
ISBN: 9781464142314
Author: Angelica M. Stacy
Publisher: W. H. Freeman
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Chapter U5.103, Problem 3E
Interpretation Introduction
Interpretation: The reason of expressing heat of combustion in negative value needs to be described.
Concept introduction: Combustion reactions are used to power vehicles, heat water and homes, and create electricity. But not all combustion reactions provide the same amount of energy.
Expert Solution & Answer
Answer to Problem 3E
Heat of combustion indicated as a negative number because energy is transferred from the system.
Explanation of Solution
Heat of reaction for a combustion reaction is usually referred to as the heat of combustion. When the reaction is exothermic heat of reaction is indicated as negative number. This is because energy is transferred from the system.
Conclusion
Heat of reaction cab indicated in kilocalories per mole, kilocalories per gram, kilojoules per mole and kilojoules per gram.
Chapter U5 Solutions
Living by Chemistry
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