H1.3 Transition of phases (Micro, macro and temperature changes)

Micro - macro, phase transitions and temperature changes

Section 1.3
Chapter 1
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Micro - macro, phase transitions and temperature changes

Section 1.3
Chapter 1

Slide 1 - Diapositive

Micro (molecules)
Macro (senses)

Slide 2 - Diapositive

Increase in temperature 
Increase in kinetic energy and space between them 

Slide 3 - Diapositive

Solid
- Fixed shape (crystal)

- Molecules are vibrating

- Not a lot of kinetic energy
         (Low temperature)

Slide 4 - Diapositive

Liquid
- No fixed shape, Volume fixed

- More space between molecules and they shake a lot more (more kinetic energy)

- Medium kinetic energy
           (medium temperature)

Slide 5 - Diapositive

Gas
- No fixed shape, no fixed volume

- Distance between molecules is big

- Velocity of molecules is high, Kinetic energy is high


Slide 6 - Diapositive

Slide 7 - Lien

Phase transitions
Phase: solid, liquid or gas
Transition: change

Phase transition is a change of phase

example: going from a liquid to a gas is called evaporation

Slide 8 - Diapositive

Phase transitions
Solid to liquid = Melting
Liquid to solid = Freezing
Liquid to gas = Evaporation
Gas to liquid = Condensation
Gas to solid = Deposition
Solid to gas = Sublimation



Slide 9 - Diapositive

Slide 10 - Diapositive

Pure substance

Slide 11 - Diapositive

Mixture

Slide 12 - Diapositive

The odor of a candle
A
Macro
B
Micro

Slide 13 - Quiz


A
Macro
B
Micro

Slide 14 - Quiz

What phase transition do you see here?
A
evaporation
B
solidification
C
condensation
D
melting

Slide 15 - Quiz

What is phase
transition 3 called?
A
evaporation
B
solidification
C
sublimation
D
deposition

Slide 16 - Quiz

Do molecules change during phase transition?
A
Yes
B
No

Slide 17 - Quiz

Mixture or
pure substance?
A
Mixture
B
Pure substance
C
Couldn't say

Slide 18 - Quiz

A mixture has a
A
boiling point
B
boiling range

Slide 19 - Quiz

Temperature scales
  • degrees Celsius  (oC)
  • Kelvin (K)
  • convert Kelvin to oC and vice versa

Slide 20 - Diapositive

20 degrees Celsius is ....... Kelvin

Slide 21 - Question ouverte

150 Kelvin is ....... degrees Celsius

Slide 22 - Question ouverte

pure substance and mixture
  • pure substance : one single substance , made up of one type of molecules

  • mixture : two of more substances mixed together, made up of different type of substance

Slide 23 - Diapositive

examples
pure substance :
sugar, alcohol , destilled water

mixture : medicines, air, tapwater 

Slide 24 - Diapositive

finding out if a substance is pure or a mixture
  • prefrom this experiment : 

Slide 25 - Diapositive

a pure substance has a melting point
a mixture has a melting range



Slide 26 - Diapositive

Slide 27 - Diapositive

Slide 28 - Diapositive

Slide 29 - Diapositive

a liquid starts to boil and temeperature slowly rises. This is a .....
A
pure substance
B
mixture

Slide 30 - Quiz

what is shown in the graph?
A
boiling point
B
melting range
C
boiling range
D
melting point

Slide 31 - Quiz

what is shown in the graph?
A
melting range
B
solidifying point
C
solidifying range
D
melting range

Slide 32 - Quiz

what is temperature ?
A
average kinetic energy of the molecules
B
total energy of the molecules
C
difference in energy of the molecules
D
Potential energy of the molecules

Slide 33 - Quiz

what is heat ?
A
average kinetic energy of the molecules
B
total energy of the molecules
C
difference in energy of the molecules
D
Potential energy of the molecules

Slide 34 - Quiz

Which of the following is NOT a phase of a substance?

A
Solid
B
Liquid
C
Density
D
Gas

Slide 35 - Quiz

A substance can change from solid to liquid. This is called a phase transition.
What is the name of this phase transition?
A
freezing
B
evaporation
C
melting
D
deposition

Slide 36 - Quiz

a liquid has a fixed shape
A
true
B
false

Slide 37 - Quiz

How many Kelvin is 75 degrees Celsius
A
-198 Kelvin
B
0,27 Kelvin
C
3,64 Kelvin
D
348 Kelvin

Slide 38 - Quiz

Solid water is directly changed into a gas.
This transition is called....
A
Sublimation
B
Melting
C
Deposition
D
Condensation

Slide 39 - Quiz

150 degrees Celsius is .....
A
288 Kelvin
B
423 Kelvin
C
4095 Kelvin
D
18,2 Kelvin

Slide 40 - Quiz