1. Aim: Solve the combined gas laws Notes 12-2

2. 1.) Gas Laws A.) Boyle’s Law 1.) The volume of a gas varies inversely with pressure. 1.) The volume of a gas varies inversely with pressure. 2.) P 1 V 1 = P 2 V 2 2.) P 1 V 1 = P 2 V 2

3. Gas Laws  Boyle’s Law….

4. B.) Charles’ Law 1.) The volume of a gas varies directly with temperature. (at fixed pressure) 2.) V 1 /T 1 = V 2 /T 2 ****Actually discovered by Joseph Louis Gay-Lussac in 1802. He gave credit to Jacques Charles’ work of 1787.

5. Charles Law Graph

6. Pressure versus Temp Graph  Pressure  Temp

7.  C.) Combined Gas Law  D.) MAKE SURE:  1.) all units for P and V are the same  2.) temp is in Kelvin  3.) if P, V, or T is held constant, or not mentioned, then cross it out  4.) STP is on Table A. Use correct P