1. Equivalents for the ways to measures of pressure Atmospheres (atm) Millimeters of mercury (mmHg) – Also known as TORR Kilopascals (kPa) 1 atm = 760 mmHg = 101.3 kPa Blaise Pascal c. 1650

2. Convert 720 Torr to: Atomospheres. 1 atm = 760 Torr Kilopascals. 101.3Kpa = 760 Torr

3. Boyles Law…at constant T Volume varies inversely with pressure. So… If pressure increases, volume decreases As If volume increases, pressure decreases Mathematically: P 1 V 1 = P 2 V 2 Push on the plunger, the volume___________ And the pressure ___________

4. Charles Law at constant P The volume of a gas varies directly with temperature SO.. As temperature, T, decreases, volume, V, decreases. As temperature increases, volume increases To solve problems, temperature must be in Kelvin, not Celsius! C+ 273 = K

5. The combined gas law P 1 V 1 = P 2 V 2 T 1 T 2 Relates pressure, volume, and temperature