3E 1_2 Phase transitions AND molecule model AND density

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1.2 Properties of substances
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Slide 1: Tekstslide
ScheikundeMiddelbare schoolvwoLeerjaar 3

In deze les zitten 19 slides, met interactieve quizzen en tekstslides.

Lesduur is: 30 min

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On table
Book, notebook, pen, pencil
Chromebook with LessonUp
Phones at table
1.2 Properties of substances

Slide 1 -Tekstslide

Today's lesson
• Discus homework Q 1-3, 7, 11-14 (Chapter 1)
• Schedule Dalton task "working with the Bunsen Burner"
• Recap last lesson
• Introduction of new subjects
• Do Q 15, 18-22 (Chapter 1)

Slide 2 -Tekstslide

A yellow solid with a melting point of 445°C, is heated to 600°C. A liquid is form.
The liquid is cooled and it solidifies at 520°C.
Has there been a reaction? Be able to explain!!!
A
YES
B
NO

Slide 3 -Quizvraag

a substance property
not a substance property
colour
smell
melting point
boiling point
mass
volume
density
phase (solid, liquid, gass)
temperature
solubility in water
solubility in oil

Slide 4 -Sleepvraag

Density :
substance's mass per unit of volume.
The symbol used for density is ρ (the lower case Greek letter rho).

Slide 5 -Tekstslide

The stone shown on the right has a mass of 18 grams.
Calculate the density of this stone.
A
0,5 g/mL
B
2 g/mL
C
9 g/mL
D
18 g/mL

Slide 6 -Quizvraag

Calculate the density.
A
0,37 g/cm3
B
2,7 kg/m3
C
2,7 g/cm3
D
0,37 kg/m3

Slide 7 -Quizvraag

The density of a gass is 3,2 g/dm3
The mass = 25 g
Calculate the volume.
A
80 L
B
7,8 L
C
7,8 mL
D
80 mL

Slide 8 -Quizvraag

The density of a metal is 2,5 g/cm3
The volume = 4 cm3
Calculate the mass.
A
4 : 2,5 = 1,6 g
B
2,5 : 4 = 0,625 g
C
2,5 x 4 = 10 g

Slide 9 -Quizvraag

There are 6 phase transitions. Put the correct description next to each of 6 phase transitions
g → l
s → l
s → g
l → s
l → g
g → s
solidification
melting
evaporation / Vapourization
condensation
deposition
sublimation

Slide 10 -Sleepvraag

Write down the correct workout in your notebook.
evaporation / vapourization
condensation
solidification
melting
deposition
sublimation
solid(s)
liquid(l)
gass (g)

Slide 11 -Sleepvraag

Sugar
(macro → micro)

Molecules are the building blocks of a pure substance!!!

Slide 12 -Tekstslide

When a substances is heated up, the molecules...
A
stand still
B
move faster
C
move slower
D
nothing happens

Slide 13 -Quizvraag

When molecules move faster ...
A
the molecules move further apart
B
the molecules move closer together
C
the molecules stick together
D
the molecules sometimes snap

Slide 14 -Quizvraag

Solid phase
Macro level
- can’t be compressed

Micro level
- the van der Waals’ forces keep molecules together at fixed positions
- molecules are very close
- molecules can only vibrate

Slide 15 -Tekstslide

Liquid phase
Macro level
- No fixed shape
- takes the shape of the container it occupies

Micro level
- molecules are close
- molecules move at a short distance and collide

Slide 16 -Tekstslide

Gaseous phase
Macro level
- can be compressed
- no fixed volume or shape

Micro level
- molecules are far apart and the velocity is higher,
- molecules hit each other harder than in a liquid
-  van der Waals’ forces is gone