### Download Presentation

A Gas

**An Image/Link below is provided (as is) to download presentation**
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

#### Presentation Transcript

**1. **Unit 5: Gases and Gas Laws

**3. **The Meaning of Temperature Kelvin temperature is an index of the random motions of gas particles (higher T means greater motion.)

**4. **Kinetic Energy of Gas Particles

**5. **Measuring Pressure

**6. **An Early Barometer

**7. **The Aneroid Barometer

**8. **Pressure Is caused by the collisions of molecules with the walls of a container
is equal to force/unit area
SI units = Newton/meter2 = 1 Pascal (Pa)
1 standard atmosphere = 101.3 kPa
1 standard atmosphere = 1 atm =
760 mm Hg = 760 torr

**9. **Units of Pressure

**10. **The Nature of Gases Gases expand to fill their containers
Gases are fluid – they flow
Gases have low density
1/1000 the density of the equivalent liquid or solid
Gases are compressible
Gases effuse and diffuse

**11. **Standard Temperature and Pressure “STP” P = 1 atmosphere, 760 torr, 101.3 kPa
T = 0°C, 273 Kelvins
The molar volume of an ideal gas is 22.42 liters at STP

**14. **Converting Celsius to Kelvin

**15. **Charles’s Law The volume of a gas is directly proportional to temperature, and extrapolates to zero at zero Kelvin.
(P = constant)

**16. **A Graph of Charles’ Law

**17. **Gay Lussac’s Law

**18. **A Graph of Gay-Lussac’s Law

**20. **Standard Molar Volume

**21. **Ideal Gas Law PV = nRT
P = pressure in atm
V = volume in liters
n = moles
R = proportionality constant
= 0.08206 L atm/ mol·K
T = temperature in Kelvins

**22. **Gas Density

**23. **Density and the Ideal Gas Law

**25. **Ideal Gases (continued)

**27. **Deviations from Ideal Behavior

**29. **Diffusion

**31. **Graham’s Law Rates of Effusion and Diffusion