College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 9 - Problems - Page 361: 24


The absolute pressure of the gas is $114.0~cm~Hg$

Work Step by Step

Since the mercury stands 40.0 cm higher in the tube that is open to the air, the gauge pressure of the gas is 40.0 cm Hg. Since the barometer reads 74.0 cm Hg, the atmospheric pressure is 74.0 cm Hg. We can find the absolute pressure of the gas: $P_{abs} = P_{atm} + P_g$ $P_{abs} = (74.0~cm~Hg)+(40.0~cm~Hg)$ $P_{abs} = 114.0~cm~Hg$ The absolute pressure of the gas is $114.0~cm~Hg$.
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