Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 9 - Problems: 9.18

Answer

See explanation below.

Work Step by Step

You get a lot more energy out when the ion pairs get together to create a solid. The lattice energy for NaCl is -780 KJ/mole, so you would get another -232 kj/mol by creating the solid.
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