## College Physics (4th Edition)

Published by McGraw-Hill Education

# Chapter 9 - Problems - Page 361: 24

#### Answer

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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