General Chemistry: Principles and Modern Applications (10th Edition)

Published by Pearson Prentice Hal
ISBN 10: 0132064529
ISBN 13: 978-0-13206-452-1

Chapter 15 - Priciples of Chemical Equilibrium - 15-5 Concept Assessment - Page 665: 15-5


We need the K value for the following reaction: $$CH_4(g) + H_2O(g) \rightleftharpoons CO(g) + 3H_2(g)$$

Work Step by Step

1. Adding both equations: $$CH_4(g) + 2 H_2O(g) + CO_2(g) + H_2(g) \leftrightharpoons CO_2(g) + CO(g) + 4H_2(g) + H_2O(g)$$ Remove the repeated ones. $$CH_4(g) + H_2O(g) \rightleftharpoons CO(g) + 3H_2(g)$$ We need the K value for this reaction. So we can reverse the given equation (CO2(g) ...), and sum them to get the required one.
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