KS3 Endothermic and Exothermic reactions chemestry

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18 Terms

1
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In an exothermic reaction, the temperature of the surroundings will...

increase

2
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In an endothermic reaction, the temperature of the surroundings will...

decrease

3
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A reaction in which the reactants have more energy than the products

exothermic

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A reaction in which the products have more energy than the reactants

endothermic

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freezing water into ice cubes

exothermic - HEAT LEAVES THE WATER TO FORM ICE

<p>exothermic - HEAT LEAVES THE WATER TO FORM ICE</p>
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boiling water

endothermic - HEAT ENTERS THE WATER TO MAKE IT BOIL

<p>endothermic - HEAT ENTERS THE WATER TO MAKE IT BOIL</p>
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evaporation

endothermic - HEAT ENTERS THE WATER TO TURN IT INTO STEAM

<p>endothermic - HEAT ENTERS THE WATER TO TURN IT INTO STEAM</p>
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baking a cake

endothermic - HEAT ENTERS, CAKE MUST BECOME WARM TO BAKE. (when the cake is in the over the oven must keep putting more heat in to cook the cake).

<p>endothermic - HEAT ENTERS, CAKE MUST BECOME WARM TO BAKE. (when the cake is in the over the oven must keep putting more heat in to cook the cake).</p>
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cooking an egg

endothermic - HEAT ENTERS, EGG MUST BECOME WARM TO COOK.

<p>endothermic - HEAT ENTERS, EGG MUST BECOME WARM TO COOK.</p>
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photosynthesis

endothermic - HEAT FROM THE SUN IS GOING INTO THE PLANT

<p>endothermic - HEAT FROM THE SUN IS GOING INTO THE PLANT</p>
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HEAT LEAVES THE SYSTEM, HEAT IS A PRODUCT

Exothermic

<p>Exothermic</p>
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HEAT GOES INTO THE SYSTEM, HEAT IS A REACTANT

Endothermic

<p>Endothermic</p>
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air activated hand warmers

exothermic

<p>exothermic</p>
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lighting a match

exothermic

<p>exothermic</p>
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campfire

exothermic

<p>exothermic</p>
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A reaction that converts chemical energy to thermal energy (heat is given out)

Exothermic reaction

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A reaction that converts thermal energy to chemical energy (heat is taken in)

Endothermic reaction

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Examples of exothermic changes

Combustion, neutralisation, displacement, condensation