1. Kaylen Bunch Andrew Durham
The Gas Phase
Kaylen Bunch
Andrew Durham

2. The Kinetic Molecular Theory
Describes what we believe to be true about gases
These ideas are called the Postulates of the Kinetic Molecular Theory

3. Postulates of the KMT
Ideal gases consist of small, invisible particles that are far apart in comparison to their own size and occupy zero volume.
Ideal gas molecules move in rapid, random straight line motion.
The collisions of ideal gas molecules are perfectly elastic: there’s no loss of energy.
There are no attractive forces between ideal gas molecules or between gaseous molecules and the walls of the container.
At any instant, the molecules in a container do not all possess the same amount of kinetic energy. The average kinetic energy of the sample is directly proportional to the absolute kelvin temperature.

4. Ideal Gas Behavior
Promoted by conditions in which the gas molecules remain very far apart
High temperatures and low pressure

5. GAS LAWS!

6. Avogadro’s Hypothesis
Equal volumes of gases at the same temperature and pressure are equal because they contain the same number of molecules.

7. Boyle’s Law
P1V1=P2V2
Volume is inversely proportional to pressure.

8. Charles’ Law
𝑉 1 𝑇 1 = 𝑉 2 𝑇 2
Volume and temperature are directly proportional.

9. Dalton’s Law of Partial Pressure
For a mixture of gases, the total pressure exerted by the mixture is equal to the sum of the partial pressures of the individual gases.

10. Graham’s Law of Effusion
The speed of the gas molecules is inversely proportional to the square root of their mass.
𝑅𝑎𝑡𝑒 𝐴 𝑅𝑎𝑡𝑒 𝐵 = 𝑀𝑜𝑙𝑎𝑟 𝑀𝑎𝑠𝑠 𝐵 𝑀𝑜𝑙𝑎𝑟 𝑀𝑎𝑠𝑠 𝐴

11. Gay-Lussac’s Law
𝑃 1 𝑇 1 = 𝑃 2 𝑇 2

12. Combined Gas Law
𝑃 1 𝑉 1 𝑇 1 = 𝑃 2 𝑉 2 𝑇 2

13. Directly Proportional
Volume
Temperature or # Molecules

14. Inversely Proportional
Volume
Pressure

15. Ideal Gas Law
PV = nRT
R =
n = number of moles