Chemistry and Chemical Reactivity (9th Edition)

by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.

Published by Cengage Learning

ISBN 10: 1133949649

ISBN 13: 978-1-13394-964-0

Chapter 5 Principles of Chemical Reactivity: Energy and Chemical Reactions - Study Questions - Page 217e: 74

Answer

More heat is evolved from 100 g of ethanol.

Work Step by Step

Since the temperature change is the same: Water: $4.184\ J/g.K\times 50.0\ g=209.2\ J/K$ Ethanol: $2.46\ J/g.K\times100.0\ g=246\ J/K$ More heat is evolved from 100 g of ethanol.

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