Warm Up 4/9 Write the formula of magnesium chloride. Hint: Mg has a charge of +2. Cl has a charge of -1. Gas Laws. Lesson : Kinetic Molecular Theory. Solids/Liquids/Gases. Describe the molecules in the following images.

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Warm Up 4/9 Write the formula of magnesium chloride.

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Kinetic Molecular Theory A model that assumes that an ideal gas is composed of tiny particles (molecules) in constant motion. Ideal Gas- an imaginary gas that perfectly fits all of the KMT.

5 Parts of KMT: 1. Matter is composed of very small particles called molecules. 2. Molecules are in constant motion. The collisions with the walls of the container cause pressure.

Continued 3. When the molecules collide with each other or the walls of a container, there is no loss of energy (elastic collision).

Example #1 (Ideal Gas Law) What is the pressure of 5 moles of a gas at 30°C in a 2 liter container? P x 2 L = 5 mols x 0.0821 x 303 K 2 L 2 L P = 60 atm

Example #2 (Ideal Gas Law) A 250 mL of a gas exerts a pressure of 760 torr at 10°C. How many moles of gas are present? 1 atm x 0.250 L = n x 0.0821 x 283 K (0.0821 x 283 K) 0.0821 x 283 K n = 0.0108 mol

7) If I have 4 moles of a gas at a pressure of 5.6 atm and a volume of 12 liters, what is the temperature? 8) If I have an unknown quantity of a gas at a pressure of 1.2 atm, a volume of 31 liters and a temperature of 87°C, how many moles of gas do I have? 9) If I put 3 moles of gas in a container with a volume of 60 liters and at a temperature of 400 K, what is the pressure inside the container. 10) If I have 7.7 moles of a gas at a pressure of 0.09 atm and a temperature of 56°C, what is the volume of gas?

Dalton's Law of Partial Pressures -states that the pressure of a gas mixture is the sum of the partial pressures of the individual components of the gas mixture. Formula: Ptotal = P1+P2+P3+...

Example (Partial Pressure) A mixture of oxygen, hydrogen and nitrogen gases exerts a total pressure of 278 kPa. If the partial pressures of the oxygen and the hydrogen are 112 kPa and 101 kPa respectively, what would be the partial pressure exerted by the nitrogen?

Avogadro’s Law -Volume and number of moles -States that the volume and # of moles of a gas are directly proportional to each other at constant temperature and pressure.