A gas sample is confined within a chamber that has a movable piston. A small load is placed on the piston; and the system is allowed to reach equilibrium. If the total weight of the piston and load is 70.0 N and the piston has an area of 5.0 * 10-4 m2, what is the pressure exerted on the piston by the gas? Note: Atmospheric pressure is 1.013 * 105 Pa.

Question

Physics

Xzavier Mcmahon

27 August, 19:51

A gas sample is confined within a chamber that has a movable piston. A small load is placed on the piston; and the system is allowed to reach equilibrium. If the total weight of the piston and load is 70.0 N and the piston has an area of 5.0 * 10-4 m2, what is the pressure exerted on the piston by the gas? Note: Atmospheric pressure is 1.013 * 105 Pa.

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Answers (1)

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Vaughn Faulkner · Answer 1

Answer: 3.87 * 10^4 Pa

Explanation:

Pressure is the Force per unit area

P = F/A

Since weight of the piston and load is 70N

Force applied by the gas is 70N

P = 70N / (5 * 10^-4) m2

P = 14 * 10^4 Pa

But the piston has to do work against the atmospheric pressure

Atmospheric pressure=1.013*10^5Pa = 10.13*10^4

Residual pressure = (14 - 10.13) * 10^4

=3.87 * 10^4Pa