The
ideal gas equation
A 2.8 gram sample
of nitrogen gas was placed in a 4000 ml container at a temperature of
15o C. What is the pressure exerted by the gas on the walls
of the container?
(Atomic mass of nitrogen = 14)
(Atomic mass of nitrogen = 14)
Solution
Step 1- Find the mole of gas present.
The molar mass of N2
= 28
=>mole = mass/Molar mass = 2.8/28 = 0.1mole
Step 2- Convert the temperature
from Celsius to Kelvin.
=>15 + 273 = 288o K
Step 3- Convert the volume
from millilitres to litres.
=> 4000/1000 = 4 litres
Step 4- Solve for pressure
(units are not written here for simplicity)
=> P = (0.1 X 8.31 X 288) / 4 =59.83 kPa