Practice Key Terms To Remember (8) - Energy Changes in Reactions - IB 10 Sciences (Group 4)

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10 questions

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6 sample questions

Question 1.
What type of reaction releases energy to the surroundings?
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Think about burns or heating processes.
Question 2.
What is the term for the minimum energy needed for a reaction to occur?
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It's the energy that 'kicks off' a reaction.
3Question 3.
What type of reaction absorbs energy from its surroundings?
- A) Exothermic
- B) Endothermic
- C) Catalytic
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Remember photosynthesis.
4Question 4.
True or False: Catalysts are consumed during a reaction.
- True
- False
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Think about enzymes in biology.
Question 5.
If the enthalpy change of a reaction is +200 kJ, is this reaction endothermic or exothermic? Justify your answer.
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Recall that positive ΔH signifies energy absorption.
Question 6.
Construct an energy profile diagram for a given exothermic reaction and label key components, including reactants, products, and activation energy.
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Visualize the energy path.

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