1. More Gas Laws Chemistry GT 4/22/15

2. Drill “Think about this…” WS (pg. 4 in your packet) HW: Finish Mixed Gas Law Problems

3. Objectives IWBAT Describe gases by their properties Use the mathematical relationships in Boyle’s, Charles’, Gay-Lussac’s, and the Combined Gas Laws.

4. Agenda Drill HW Review Gas Law Notes Demonstrations Video & Discussion Closure

5. HW Review Let’s go over the answers—any questions??

6. The Gas Laws: Boyle’s and Charles’ Boyle’s Law: Pressure and Volume of a gas are indirectly proportional to each other. As pressure goes up, volume goes down (and visa-versa) P 1 V 1 = P 2 V 2 Charles’ Law: Volume and Temperature of a gas are directly proportional to each other. As temperature goes up, volume goes up (and visa-versa) V 1 / T 1 = V 2 / T 2

7. The Gas Laws: Gay-Lussac’s and Combined Gay-Lussac’s Law: Pressure and temperature of a gas are directly proportional to each other. As temperature goes up, so does the pressure (and visa-versa) P1 / T1 = P2 / T2 The Combined Gas Law: P1V1 = P2 V2 T1 T2

8. The Gas Laws: Dalton’s and Graham’s Dalton’s Law of Partial Pressures The pressures of mixed gases add together. P Total = P 1 + P 2 + P 3 +... Graham’s Law Compares the rates of diffusion of any two gases using the following equation: Ms. Bloedorn will write it on the board

9. Moles and Gases As you increase the amount of a gas (moles), the volume increases too. Avogadro’s Law: V 1 = V 2 n 1 n 2 It is rarely used in this form.

10. Demonstrations We are going to watch a series of demonstrations and discuss them. (15 min.) https://www.youtube.com/watch?v=l2ZsvOL0B ds https://www.youtube.com/watch?v=l2ZsvOL0B ds

11. Closure How did he blow up a balloon INSIDE of a flask??