3. Not so long ago, in a chemistry lab far far away… May the FORCE/area be with you

5. 1.Describe Gay-Lussac’s Law with a formula 2.Use Gay-Lussac’s Law to determine either a temperature or volume 3.Combine all three laws into the Combined Gas Law 4.Use the Combined Gas Law to determine either temperature, volume or pressure

7. If n and V are constant, then P α T P and T are directly proportional.  If one temperature goes up, the pressure goes up! Joseph Louis Gay- Lussac (1778-1850)

8. Gay Lussac’s Law Summary The pressure and temperature of a gas are directly related, provided that the volume remains constant.

9. P1P1 T1T1 P2P2 T2T2 3.00 atm 298 K P2P2 325 K 3.3 atm

10. P1P1 T1T1 P2P2 T2T2 1.8 atm 293 K 1.9 atm T2T2 310 K or 36 o C

12. Now let’s put all 3 laws together into one big law…….

13.  The good news is that you don’t have to remember all three gas laws! Since they are all related to each other, we can combine them into a single equation. BE SURE YOU KNOW THIS EQUATION! No, it’s not related to R2D2

14. The Combined Gas Law The combined gas law expresses the relationship between pressure, volume and temperature of a fixed amount of gas. Boyle’s law, Gay-Lussac’s law, and Charles’ law are all derived from this by holding a variable constant.

15. If you should only need one of the other gas laws, you can cover up the item that is constant and you will get that gas law! = P1P1 V1V1 T1T1 P2P2 V2V2 T2T2 Boyle’s Law Charles’ Law Gay-Lussac’s Law

16. Greatest Reasons for Termination from a Job 1. The inability to get along with co-workers and supervisors. 2. Absenteeism 3. Lack of interest 4. Continuously making costly mistakes 5. Does not follow directions 6. Shows an unwillingness to learn

17. Hint #5. A record of data is essential. It fools the instructor into thinking that you were working.

18. 1.Describe Gay-Lussac’s Law with a formula. 2.Use Gay-Lussac’s Law to determine either a temperature or volume 3.Combine all three laws into the Combined Gas Law 4.Use the Combined Gas Law to determine either temperature, volume or pressure

19. P1P1 V1V1 P2P2 V2V2 (1.00 atm)(3.60 L)2.50 atm(V 2 ) 1.44 L

20. The End!!!