Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 5 - Gases - Review Questions - Page 232: 8

Answer

Volume of the gas decreases.

Work Step by Step

As XY is formed, the net number of gas particles decreases. Since pressure stays constant (piston is free to move) and temperature will stay close to constant, since number of gas particles halves, volume should about halve as well.
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