Living by Chemistry
Living by Chemistry
2nd Edition
ISBN: 9781464142314
Author: Angelica M. Stacy
Publisher: W. H. Freeman
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Concept explainers

Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that …
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energ…
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Question
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Chapter U5.94, Problem 1TAI
Interpretation Introduction

Interpretation: The reactions that are sources of heat needs to be explained.

Concept introduction: In exothermic reactions reactants changes into products that are very hot. Over time hot products cool down as they transfer heat to the surrounding.

Expert Solution & Answer
Check Mark

Answer to Problem 1TAI

Exothermic reactions are source of heat.

Explanation of Solution

Energy is not a substance, so energy does not have mass and does not take up space. Living things needs energy from the sun to grow. Energy is a measure of ability to cause change to occur. Exothermic reactions transfers energy in the form of heat and light. Fire is an example of exothermic reaction. Thus exothermic reactions are source of heat.

Conclusion

Exothermic changes are associated with big changes to matter. Any change in matter is accompanied by a change in energy.

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Chapter U5.94, Problem 1E

Chapter U5 Solutions

Living by Chemistry

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