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Y2_T4_LSN_4.4
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Science
Middelbare school
havo, vwo
Leerjaar 2
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Slide 1 - Slide
Topic 4
Moving in the world
Slide 2 - Slide
Plan for today
Explanation T4.4 Temperature and heat
Make homework
Slide 3 - Slide
4.4 Temperature and heat
Slide 4 - Slide
Learning goals
I can....
describe the concept of temperature, the different scales it can be measured on and the units that belong to those.
convert temperatures between the Celsius and Kelvin scale.
describe the concept of heat and the units it can be measured in.
distinguish between the concepts of temperature and heat
describe the concept of heat of combustion and use it to calculate the amount of energy released during combustion.
Slide 5 - Slide
Key words
Heat
Temperature
Celsius
Kelvin
Heat of combustion
Slide 6 - Slide
Heat
Total amount of energy of the molecules that are present in a piece of matter
Unit of heat = Joules (J)
The bigger the energy, the bigger the heat
Slide 7 - Slide
Temperature
Indication of average amount of kinetic energy (movement) per molecule
Symbol: Temperature ( T )
Unit: Degrees Celsius ( °C ) and Kelvin (K)
Slide 8 - Slide
Heat vs Temperature
Slide 9 - Slide
Slide 10 - Video
Temperature in Celsius
Based on water
0 °C , water going from solid to liquid or back
100 °C, water going from liquid to gas or back
Slide 11 - Slide
Temperature in Kelvin
Temperature can also be measured in Kelvin (no degrees)
-273 degrees Celsius = 0 Kelvin
0 degrees Celsius = 273 Kelvin
1 degrees up in Celsius=
1 Kelvin up
Slide 12 - Slide
How many Kelvin is 75 degrees Celsius
A
-198 Kelvin
B
0,27 Kelvin
C
3,64 Kelvin
D
348 Kelvin
Slide 13 - Quiz
Heat of combustion
Combustion reactions:
Burning fuels produces heat that is used
for many purposes (exothermic)
Different fuels give off different amounts
of heat, this is known as the heat of combustion.
(MJ = Mega Joules = 1.000.000J)
Slide 14 - Slide
Gasoline has a heat of combustion of 32 MJ/kg
How much energy wil you get by burning 0,5 kg?
A
64 MJ
B
32 MJ
C
16 MJ
D
32,5 MJ
Slide 15 - Quiz
Homework
Study the glossary of 4.4
Complete the exercises of 4.4 (p. 184-187)
Prepare labjournal
timer
10:00
Slide 16 - Slide
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