1. Launch: 2/3
 Grab your binder and immediately take a seat!
 Place launch paper and yesterday’s practice questions
on your desk.
 Yesterday’s Exit Slip Data:
96%!
 Today’s Objectives: I can describe temperature relates to
molecular motion. I can convert between Kelvin and
Celsius temperature scales.

2. Launch: 2/3
 Grab your binder and immediately take a seat!
 Place launch paper and yesterday’s practice questions
on your desk.
 Yesterday’s Exit Slip Data:
95%!
 Today’s Objectives: I can describe temperature relates to
molecular motion. I can convert between Kelvin and
Celsius temperature scales.

3. Launch: 2/3
 Grab your binder and immediately take a seat!
 Place launch paper and yesterday’s practice questions
on your desk.
 Yesterday’s Exit Slip Data:
97%
 Today’s Objectives: I can describe temperature relates to
molecular motion. I can convert between Kelvin and
Celsius temperature scales.

4. Launch: 2/3
 Grab your binder and immediately take a seat!
 Place launch paper and yesterday’s practice questions
on your desk.
 Yesterday’s Exit Slip Data:
95%
 Today’s Objectives: I can describe how temperature
relates to molecular motion. I can convert between Kelvin
and Celsius temperature scales.

5. Launch 2/3
1. Draw a picture of perfume from a beautiful lady
(or cologne from a gorgeous man) diffusing across
a dance floor to your nose.
• How do the gas molecules move?

6. Launch 2/3
2. After one gas fully diffuses into another, the
gas molecules are
a. slowed down by the increase in ionic interactions.
b. considered to be a heterogeneous mixture.
c. not as likely to react chemically.
d. evenly mixed together and evenly distributed around
their container.

7. Launch 2/3
3. If gas molecules move really fast, why does
it take a few minutes for someone to smell
perfume across a large room?
a. the increase in the airspace occupied by perfume
molecules
b. the chemical reaction with the nerves, with is slower
than other sensory processes
c. intermolecular forces between the air and perfume
molecules
d. random collisions between the air and perfume
molecules

8. Announcements
 Unit #7: Gases
 New unit
 Start of on the right foot
 Quiz on Friday!

9. Monday
February Calendar
LPS Chem, Assessments, Unit Plan
Tuesday Wednesday Thursday
Feb 2010 (Pacific Time)
Friday
1 2 3 4 5
Staff PD No School Gases and Their Properties
Today Quiz!
8 9 10 11 12
Gases and Their Properties
Quiz!
15 16 17 18 19
President's Week No School
22 23 24 25 26
Gases and Their Properties
Exam!

10. Opening
 Today’s Objective: I can describe how temperature
relates to molecular motion. I can convert between
Kelvin and Celsius temperature scales.
 Standard – CH.4.e & CH.4.a
Molecular Motion Applet

11. What is temperature?
Mr. Heffner
2/3/10

12. What is temperature?
 Temperature is… movement
 a measure of the kinetic energy in a substance
 temp = molecules move faster
 temp = molecules move slower
Ice (solid) Water (liquid) Steam (gas)
< <
slowest moderate fastest

13. What is temperature?
 Temperature can be measured…
✗
1. On the Fahrenheit scale
 unit = °F
“degrees
Fahrenheit”

14. What is temperature?
 Temperature can be measured…
2. On the Celsius scale
Water boils 100°C
 unit = °C
Water freezes 0°C
“degrees
Celcius”
-273°C

15. What is temperature?
 Temperature can be measured…
3. On the Kelvin scale
Water boils 373K
 unit = K
Water freezes 273K
“Kelvin”
0K
No negative
numbers!

16. What is temperature?
 Celsius can be converted to Kelvin by…
K = °C + 273
temp in temp in
Kelvin Celsius

17. Example
1. Water boils at 100°C. What temperature is that in
Kelvin? plug & chug
K = °C + 273
K = (100) + 273
K = 373
373 K

18. Example
2. Convert 0K to Celsius.
plug & chug
K = °C + 273
(0) = °C + 273
–273 –273
–273 = °C
–273°C

19. Example
3. Convert 37°C to Kelvin.
plug & chug
K = °C + 273
K = (37) + 273
K = 310
310 K

20. Example
4. If methane (CH4) boils at 112K, what is it’s boiling
point in °C? plug & chug
K = °C + 273
(112) = °C + 273
–273 –273
–161 = °C
–161°C

21. Molecular Motion Activity
 Everyone stand up
 Push in chairs
 Clear the floor around you
 We are going to move like gas molecules
 Look at the thermometer to
 Rules:
 Be safe
 Be respectful
 Give me your attention (3, 2, 1…)

22. Room Temperature
25°C 298K

23. Water is boiling!
100°C 373K

24. Room Temperature
25°C 298K

25. Ice is forming!
0°C 273K

26. It’s smokin’ hot!
300°C 573K

27. It’s ridiculously cold!
-272°C 1K

28. Find your seat!

29. Practice Questions
 Practice question worksheet

30. Closing
 Today’s Objective: I can describe how temperature
relates to molecular motion. I can convert between
Kelvin and Celsius temperature scales.
 Standard – CH.4.e & CH.4.a
Molecular Motion Applet

31. Exit Slip
1. Temperature measures
a. the height at which gas molecules travel in the
atmosphere
b. the amount of kinetic energy in a substance
c. quantities in units of °G
d. the time it takes for the weather to change

32. Exit Slip
2. Molecules in a substance at 50°C
a. move faster than molecules in a substance at 25°C
because they have less kinetic energy
b. move faster than molecules in a substance at 25°C
because they have more kinetic energy
c. move slower than molecules in a substance at 25°C
because they have less kinetic energy
d. move slower than molecules in a substance at 25°C
because they have more kinetic energy

33. Exit Slip
3. Which of the following is the correct
equation for converting between Kelvin and
Celsius temperature scales?
a. K = °C + 273
b. °C = K + 273
c. K = C + 373
d. °C = K + 373

34. Exit Slip
4. Water boils at 100°C. What is that
temperature in Kelvin?
a. -173K
b. 100K
c. 173K
d. 373K

35. Exit Slip
5. What is the equivalent of 423K in degrees
Celsius?
a. -223°C
b. -23°C
c. 150°C
d. 696°C

36. Homework
 Finish practice questions