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Endothermic Reactions
Endothermic Reaction
Lesson 2
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Slide 1:
Tekstslide
Science
Secondary Education
Age 12,13
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Endothermic Reaction
Lesson 2
Slide 1 - Tekstslide
How do you feel today?
๐
๐
๐
๐
๐
Slide 2 - Poll
Recall of the previous lesson
Burning only happens in the presence of a _______ , ________ gas, and heat or __________ energy.
The other term for burning is _____.
Chemical energy stored in the fuel changes to heat and light during burning.
Slide 3 - Tekstslide
Recall of the previous lesson
Burning only happens in the presence of a _______ , ________ gas, and heat or __________ energy.
The other term for burning is _____.
___________ energy stored in the fuel changes to heat and light during burning.
fuel
Slide 4 - Tekstslide
Recall of the previous lesson
Burning only happens in the presence of a _______ , ________ gas, and heat or __________ energy.
The other term for burning is _____.
Chemical energy stored in the fuel changes to heat and light during burning.
fuel
oxygen
Slide 5 - Tekstslide
Recall of the previous lesson
Burning only happens in the presence of a _______ , ________ gas, and heat or __________ energy.
The other term for burning is _____.
fuel
oxygen
thermal
Slide 6 - Tekstslide
Recall of the previous lesson
Burning only happens in the presence of a _______ , ________ gas, and heat or __________ energy.
The other term for burning is _____.
__________ energy stored in the fuel changes to heat and light during burning.
fuel
oxygen
thermal
combustion
Slide 7 - Tekstslide
Recall of the previous lesson
Burning only happens in the presence of a _______ , ________ gas, and heat or __________ energy.
The other term for burning is _____.
__________ energy stored in the fuel changes to heat and light during burning.
fuel
oxygen
thermal
combustion
Chemical
Slide 8 - Tekstslide
Recall of the previous lesson
Heat is released to the ___________ in an exothermic reaction.
Temperature _____________ in exothermic reactions. (like from 20
o
C to 25
o
C).
Slide 9 - Tekstslide
Recall of the previous lesson
Heat is released to the ___________ in an exothermic reaction.
Temperature _____________ in exothermic reactions. (like from 20
o
C to 25
o
C).
surroundings
Slide 10 - Tekstslide
Recall of the previous lesson
Heat is released to the ___________ in an exothermic reaction.
Temperature _____________ in exothermic reactions. (like from 20
o
C to 25
o
C).
surroundings
increases
Slide 11 - Tekstslide
Types of Chemical Reactions
exo
thermic =
endo
thermic =
Slide 12 - Tekstslide
Types of Chemical Reactions
exo
thermic =
endo
thermic =
exit / release of heat
heat enters or is absorbed for the reaction to happen.
Slide 13 - Tekstslide
What do we need for this ice to get melted?
Slide 14 - Tekstslide
Endothermic Reaction
a chemical reaction that
absorbs heat
or thermal energy from the surroundings
thermal energy
is
changed
to
chemical energy
stored in the chemical bonds
Slide 15 - Tekstslide
Slide 16 - Tekstslide
Endothermic
Exothermic
Slide 17 - Sleepvraag
Endothermic process
Exothermic reaction
Slide 18 - Tekstslide
phet.colorado.edu
Slide 19 - Link
Endothermic process
vs
Endothermic reaction
endothermic
process
- no reaction has taken place (dissolving) ;
NO
NEW products are formed.
endothermic reaction - reaction has taken place ;
NEW PRODUCTS
are formed.
Slide 20 - Tekstslide
page 271 , LB
Activity
Slide 21 - Tekstslide
What 2 things have your learned today?
Slide 22 - Open vraag
Rate your understanding of the lesson.
1
5
Slide 23 - Poll
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