Practice Energy Changes In Chemical Reactions (1.4)

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6 sample questions

Question 1.
What is an exothermic reaction?
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Think about combustion.
Question 2.
Define an endothermic reaction.
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Consider a reaction that cools the environment.
3Question 3.
Which type of reaction releases energy?
- a) Endothermic
- b) Exothermic
- c) Both
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Think about a fire.
4Question 4.
True or False: Endothermic reactions release heat.
- True
- False
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Consider a cold pack.
Question 5.
You experiment with different chemical reactions and observe the temperature changes. If a reaction's temperature drops initially, what can you infer about it?
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Think about how the heat is moving.
Question 6.
Draw and label an energy profile diagram for a combustion reaction. What key features would you include?
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Remember the energy levels of reactants and products.

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