2 4 what is pressure
TRANSCRIPT
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%!
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%!
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%
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%
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?
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.
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
Announcements Unit #7: Gases
New unit Start of on the right foot
Quiz on Friday!
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
Opening Today’s Objective: I can describe how the random
collisions between gas molecules creates pressure on a surface. Standard – CH.4.a
Today’s Questions: What is pressure?
What is pressure? Mr. Heffner
2/4/10
What is pressure? Pressure is…
a measure of the force that gases exert on an object
This force comes from…
the random collisions of gas molecules with the walls of a container
What is pressure? Pressure increases when…
the # of collisions increases the speed of the gas molecules increases
Molecular Motion Applet
What increases the
speed?
…temperature is increased!
What is pressure?
temperature = collisions = pressure
What is pressure? Pressure is measured in units of…
1. atmospheres (atm) 1 atm = pressure @ sea level
2. millimeters of mercury (mmHg) 760 mmHg = pressure @ sea level
1 atm = 760 mmHg
Foldable Define the following terms:
1. pressure 2. temperature
Practice Questions Practice question worksheet
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
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
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
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
Exit Slip 4. Water boils at 100°C. What is that
temperature in Kelvin? a. -173K
b. 100K c. 173K d. 373K
Exit Slip 5. What is the equivalent of 423K in degrees
Celsius? a. -223°C
b. -23°C c. 150°C d. 696°C
Homework Finish practice questions