"Published in Newark, California, USA"
A 10 L vessel containing 8.00 grams of O2 is connected by means of a valve to a 5 L vessel containing 7.00 grams of N2. When the valve was opened and the gases are allowed to mix, what will be the total pressure of the gas mixture at 25°C assuming the temperature was kept constant?
Solution:
The first thing that we need to do is to get the number of moles of O2 and N2.
The number of moles of O2 is
The number of moles of N2 is
The absolute temperature of the gas mixture is
The universal gas law constant for L, gmole, K, and atm is
.The partial pressure of O2 at the gas mixture is
The partial pressure of N2 at the gas mixture is
Therefore, the total pressure of the gas mixture is
