Energy In Reactions: Heat, Light And Everyday Chemistry

Know when reactions release or absorb energy

ScienceGrade 10Mixed12 questions24 min

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Section A: Exothermic Reactions · 6 questionsSection B: Endothermic Reactions · 6 questions

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Section A: Exothermic Reactions

Identify reactions that release heat or light.

Use energy clues to classify the reaction.

Question 1

EasyQuestion

A reaction that releases heat is called:

Topic: Energy in Reactions · Skill: Identify energy changes in daily-life reactions

Question 2

EasyQuestion

Which is an exothermic process?

Topic: Energy in Reactions · Skill: Identify energy changes in daily-life reactions

Question 3

MediumQuestion

Respiration is considered exothermic because:

Topic: Energy in Reactions · Skill: Classify reactions as redox reactions

Question 4

MediumQuestion

If the temperature of a reaction mixture rises, the reaction is likely:

Topic: Energy in Reactions · Skill: Identify reduction using loss of oxygen or gain of hydrogen

Question 5

AdvancedQuestion

Why is combustion usually exothermic?

Topic: Energy in Reactions · Skill: Identify energy changes in daily-life reactions

What this assignment covers

Understand exothermic and endothermic reactions through combustion, respiration, photosynthesis, decomposition and temperature-change clues.

Skills and sections

Identify energy changes in daily-life reactions, Classify reactions as redox reactions, Identify reduction using loss of oxygen or gain of hydrogen, Identify oxidation using gain of oxygen or loss of hydrogen

Section A: Exothermic Reactions: 6 questions
Section B: Endothermic Reactions: 6 questions