Question

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 ,m^2 what is the pressure exerted on the piston by the gas.

Note: Atmospheric pressure is 1.013*10^5 Pa

Answer 1

Pressure = Force/Area

So Force = 70N and Area = 5.0 X 10^-4

P=70/5 X 10^-4

= 14 X 10⁴

=1.4 X 10⁵

To get Total pressure we have add the atmospheric pressure and Piston pressure

So P = 1.4 X 10⁵+1.013 X 10⁵

P = 2.413 X 10⁵ Pa