Gas Pressure Formula

The Gas pressure formula is given as,

Where,

F = impact force due to gas collisions in Newtons (N),

A = area in meter square

The Ideal gas pressure formula is given as,

Where,

V = volume,  

n = number of moles,

R = Gas constant, (8.3145 Jol/mol/K)

T = temperature.

The SI unit for Gas pressure is expressed in Pascals (Pa).

Example 1

There are 500 moles of gas molecules in a container. If 220 K temperature is applied to the gas of a volume of 40 L, identify the Gas pressure.

Solution

Given :

No of moles n = 500 mol,

temperature T = 220 K,

Volume V = 40 L

The Gas pressure formula is given by,

P = 500 ×0.082×220 / 40

P = 225.5 Pascal

Example 2

If the Gas molecules move with the force of 300 N in the area of 50 m2. Determine its gas pressure.

Solution:

Given:

Force F = 300 N,

area A = 50 m2

The gas pressure formula is given by,

P = F / A

P = 300 / 50

P = 6 Pascal