Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 10 - Gases - Exercises - Page 432: 10.4e


False, the volume decreases by 33%

Work Step by Step

We have 2 CO + O2 --> 2 CO2 In this reaction, we go from 3 moles on the left to 2 moles on the right. The ideal gas law is PV = nRT we are told that the piston maintains constant pressure and constant temperature. Therefore, the only thing changing is the number of moles, n, from 3 to 2, which means the volume must decrease from 3 to 2. If it was originally 3 and it increases to 2, this is an decrease of 1, which is an decrease of 33%.
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