How gas pressure is produced?
Gas molecules are at constant and random movements.
When the molecules collide with the wall of the container and bounce back, they experience a change in momentum.
The momentum change exerts a force on the wall.
Force per unit area is the pressure exerted on the wall of the container.
Pgas = Patm + Pliquid
Pgas = Gas Pressure
Figure above shows the water levels in a water manometer used to measure the pressure of a gas supply. Find the pressure of the gas in unit of
Figure above shows a U-tube filled with 2 liquids X and Y that do not mix. Given that the density of liquid Y is 1.6g/cm3. Find the density of liquid X.
Figure above shows a capillary containing a column of mercury. If the atmospheric pressure is 100,000Pa, find the pressure of the gas trapped in the capillary tube. [Density of mercury = 13,600kg/m3]