2 3 What Is Temperature
Transcript of 2 3 What Is Temperature
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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:
Today’s Objectives: I can describe temperature relates to molecular motion. I can convert between Kelvin and Celsius temperature scales.
96%!
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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:
Today’s Objectives: I can describe temperature relates to molecular motion. I can convert between Kelvin and Celsius temperature scales.
95%!
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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:
Today’s Objectives: I can describe temperature relates to molecular motion. I can convert between Kelvin and Celsius temperature scales.
97%
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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:
Today’s Objectives: I can describe how temperature relates to molecular motion. I can convert between Kelvin and Celsius temperature scales.
95%
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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?
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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.
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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
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Announcements Unit #7: Gases
New unit Start of on the right foot
Quiz on Friday!
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Feb 2010 (Pacific Time)LPS Chem, Assessments, Unit Plan
1 2 3 4 5
8 9 10 11 12
15 16 17 18 19
22 23 24 25 26
Staff PD No School Gases and Their Properties
Gases and Their Properties
President's Week No School
Gases and Their Properties
Monday Tuesday Wednesday Thursday Friday
February Calendar
Exam!
Quiz!
Quiz! Today
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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
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What is temperature? Mr. Heffner
2/3/10
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What is temperature? Temperature is…
a measure of the kinetic energy in a substance
temp = molecules move faster
temp = molecules move slower
movement
Ice (solid) Water (liquid) Steam (gas)
< <
slowest moderate fastest
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What is temperature? Temperature can be measured…
1. On the Fahrenheit scale unit = °F
“degrees Fahrenheit”
✗
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What is temperature? Temperature can be measured…
2. On the Celsius scale unit = °C
“degrees Celcius”
-273°C
0°C
100°C Water boils
Water freezes
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What is temperature? Temperature can be measured…
3. On the Kelvin scale unit = K
“Kelvin”
0K
273K
373K Water boils
Water freezes
No negative numbers!
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What is temperature? Celsius can be converted to Kelvin by…
K = °C + 273
temp in Kelvin
temp in Celsius
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Example 1. Water boils at 100°C. What temperature is that in
Kelvin?
K = °C + 273
K = (100) + 273
K = 373
373 K
plug & chug
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Example 2. Convert 0K to Celsius.
K = °C + 273
(0) = °C + 273
–273 = °C
–273°C
plug & chug
–273 –273
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Example 3. Convert 37°C to Kelvin.
K = °C + 273
K = (37) + 273
K = 310
310 K
plug & chug
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Example 4. If methane (CH4) boils at 112K, what is it’s boiling
point in °C?
K = °C + 273
(112) = °C + 273
–161 = °C
–161°C
plug & chug
–273 –273
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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…)
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Room Temperature
298K 25°C
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Water is boiling!
373K 100°C
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Room Temperature
298K 25°C
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Ice is forming!
273K 0°C
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It’s smokin’ hot!
573K 300°C
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It’s ridiculously cold!
1K -272°C
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Find your seat!
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Practice Questions Practice question worksheet
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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
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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
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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
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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
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Exit Slip 4. Water boils at 100°C. What is that
temperature in Kelvin? a. -173K
b. 100K c. 173K d. 373K
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Exit Slip 5. What is the equivalent of 423K in degrees
Celsius? a. -223°C
b. -23°C c. 150°C d. 696°C
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Homework Finish practice questions