# 45 L of nitrogen, 15 L of oxygen and 60 L of carbon dioxide were mixed. Determine the volume fraction of gases in the resulting mixture. Given: V (nitrogen) = 45 liters, V (oxygen) = 15 liters, V (carbon dioxide) = 60 liters.
Find: ϕ (nitrogen) – ?, ϕ (oxygen) – ?, ϕ (carbon dioxide) – ?.
Decision.
1st way
1. We calculate the volume of the mixture:
V (mixture) = V (nitrogen) + V (oxygen) + V (carbon dioxide) = 45 L + 15 L + 60 L = 120 L.
2. We calculate the volume fraction of nitrogen in a mixture of gases:
ϕ (nitrogen) = V (nitrogen) / V (mixture) = 45 l: 120 l = 0.375, or,
multiplying this value by 100%, we get 37.5%.
3. We calculate the volume fraction of oxygen in a gas mixture:
ϕ (oxygen) = V (oxygen) / V (mixture) = 15 l: 120 l = 0.125, or 12.5%.
4. We calculate the volume fraction of carbon dioxide in a mixture of gases:
ϕ (carbon dioxide) = V (carbon dioxide) / V (mixture) = 60 l: 120 l = 0.5, or 50%.
2nd way
1. Calculate the volume of the mixture:
V (mixture) = V (nitrogen) + V (oxygen) + V (carbon dioxide) = 45 l + 15 l + 60 l = 120 l.
2. We calculate the volume fraction of nitrogen in a mixture of gases:
ϕ (nitrogen) = V (nitrogen) / V (mixture) = 45 l: 120 l = 0.375, or,
multiplying this value by 100%, we get 37.5%.
3. We calculate the volume fraction of oxygen in a gas mixture:
ϕ (oxygen) = V (oxygen) / V (mixture) = 15 l: 120 l = 0.125, or 12.5%.
4. We calculate the volume fraction of carbon dioxide in a mixture of gases:
ϕ (carbon dioxide) = 100% -ϕ (nitrogen) -ϕ (oxygen) = 100% – 37.5% – 12.5% ​​= 50%.
Answer: ϕ (nitrogen) = 37.5%, ϕ (oxygen) = 12.5%, ϕ (carbon dioxide) = 50%. Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.