In chemical reactions, energy is not created or what?
Destroyed
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When classified by energy transfer, what are the 2 types of chemical reaction?
Endothermic
Exothermic
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Energy from the surroundings is transferred to the reacting chemicals, causing the temperature of the surroundings to decrease. Examples include thermal decomposition and the reaction that happens when citric acid is combined with sodium hydrogen carbonat
Endothermic reactions
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Energy from the reacting chemicals is transferred to the surroundings which often increases in temperature as a result. Examples include combustion, neutralisation, and oxidation reactions.
Exothermic reactions
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A hand warmer is an example of what reaction?
Exothermic
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How does the reaction of ammonium nitrate and water affect the temperature of the surroundings?
Instant cooling
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Thermal decomposition, sports injury packs and citric acid + baking soda are examples of what?
Endothermic reactions
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What happens in endothermic reactions?
Energy from the surroundings is transferred to the reacting chemicals
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What is activation energy?
The minimum amount of energy that reacting particles must have for a reaction to happen
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x-axis in reaction profile diagrams?
Progress of reaction
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y-axis in reaction profile diagrams?
Energy
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A graph shows the reaction profile for an exothermic reaction. What would be different if the reaction were endothermic?
The energy of the products will be higher than the reactants
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In order for a reaction to take place, there must be a what between the reacting particles?
Collision
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Other cards in this set
Card 2
Front
When classified by energy transfer, what are the 2 types of chemical reaction?
Back
Endothermic
Exothermic
Card 3
Front
Energy from the surroundings is transferred to the reacting chemicals, causing the temperature of the surroundings to decrease. Examples include thermal decomposition and the reaction that happens when citric acid is combined with sodium hydrogen carbonat
Back
Card 4
Front
Energy from the reacting chemicals is transferred to the surroundings which often increases in temperature as a result. Examples include combustion, neutralisation, and oxidation reactions.
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