Highland Science Department Dalton's Law of Partial Pressures

1. Highland Science Department Dalton's Law of Partial Pressures

2. Highland Science Department Dalton's Law of Partial Pressures Partial Pressure: the portion of the final pressure of a mixture of gases contributed by a single gas component

3. Highland Science Department Dalton's Law of Partial Pressures Partial Pressure: the portion of the final pressure of a mixture of gases contributed by a single gas component Dalton's Law of Partial Pressures: the total pressure of a mixture of gases is the sum of the individual pressures of each gas

4. Highland Science Department Dalton's Law of Partial Pressures Partial Pressure: the portion of the final pressure of a mixture of gases contributed by a single gas component Dalton's Law of Partial Pressures: the total pressure of a mixture of gases is the sum of the individual pressures of each gas mathematically: Ptotal = Pgas 1 + Pgas2 + Pgas 3

5. Highland Science Department Dalton's Law of Partial Pressures explanation: when two gases are in the same container, the molecules of each gas collide with the walls of the container as many times and with the same force as the molecules would do if the gases were in separate containers.

6. Highland Science Department Dalton's Law of Partial Pressures explanation: when two gases are in the same container, the molecules of each gas collide with the walls of the container as many times and with the same force as the molecules would do if the gases were in separate containers.

7. Highland Science Department Dalton's Law of Partial Pressures Finding the pressure contributed to a mixture by each gas: Pgas1 = % gas x Ptotal 100%

8. Highland Science Department Dalton's Law of Partial Pressures e.g. If carbon dioxide and methane make up 0.03485% and 0.00015% of the atmospheric gases respectively, how much pressure does each contribute to air pressure at standard pressure?

9. Highland Science Department Dalton's Law of Partial Pressures e.g. If carbon dioxide and methane make up 0.03485% and 0.00015% of the atmospheric gases respectively, how much pressure does each contribute to air pressure at standard pressure? G: %CO2 = 0.03485% %CH4 = 0.00015% standard pressure = 101.3 kPa

10. Highland Science Department Dalton's Law of Partial Pressures e.g. If carbon dioxide and methane make up 0.03485% and 0.00015% of the atmospheric gases respectively, how much pressure does each contribute to air pressure at standard pressure? G: %CO2 = 0.03485% %CH4 = 0.00015% standard pressure = 101.3 kPa U: 1. CO2 partial pressure 2. CH4 partial pressure

11. Highland Science Department Dalton's Law of Partial Pressures e.g. If carbon dioxide and methane make up 0.03485% and 0.00015% of the atmospheric gases respectively, how much pressure does each contribute to air pressure at standard pressure? S: Pgas = %gas x Ptotal 100%

12. Highland Science Department Dalton's Law of Partial Pressures e.g. If carbon dioxide and methane make up 0.03485% and 0.00015% of the atmospheric gases respectively, how much pressure does each contribute to air pressure at standard pressure? S: 1. PCO2 = 0.03485% x 101.3 kPa 100 % = 0.03530 kPa = 35.30 Pa

13. Highland Science Department Dalton's Law of Partial Pressures e.g. If carbon dioxide and methane make up 0.03485% and 0.00015% of the atmospheric gases respectively, how much pressure does each contribute to air pressure at standard pressure? S: 1. PCO2 = 0.03485% x 101.3 kPa 100 % = 0.03530 kPa = 35.30 Pa 2. PCH4 = 0.00015% x 101.3 kPa 100 % = 0.15 Pa