Back to the lesson and practice
PrintablePractice worksheet
Do it🖨️ On paper✏️ On screen
Layout1 column2 columns
Answer keyNoneAnswersWith steps
Questions10162430
LevelEasierMixedHarder
Print sizeNormalLarge print
New copyMake a new one

Free to print and copy for home or class. This link always prints the same sheet.

eurekami

Exothermic and endothermic reactions

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-PS1-6, NGSS.HS-PS1-4 · England: KS3 Chemistry: Energetics, KS4 Combined Science: Energy changes in chemistry

Name

Date

Score/ 16

  1. Question 1

    The temperature of a reaction mixture changes from 20 °C to 29 °C. What is the temperature change? (Use a minus sign for a fall.)

    Answer°C

  2. Question 2

    Is this exothermic or endothermic: thermal decomposition of calcium carbonate?

    • A. exothermic
    • B. endothermic

  3. Question 3

    A self-heating can of coffee uses which kind of reaction?

    • A. photosynthesis
    • B. endothermic
    • C. exothermic
    • D. nuclear

  4. Question 4

    The temperature of a reaction mixture changes from 19 °C to 36 °C. What is the temperature change? (Use a minus sign for a fall.)

    Answer°C

  5. Question 5

    Is this exothermic or endothermic: respiration?

    • A. exothermic
    • B. endothermic

  6. Question 6

    What is activation energy?

    • A. the minimum energy particles need to react when they collide
    • B. the energy of light
    • C. the energy in a battery
    • D. the energy given out by a reaction

  7. Question 7

    The temperature of a reaction mixture changes from 19 °C to 12 °C. What is the temperature change? (Use a minus sign for a fall.)

    Answer°C

  8. Question 8

    Is this exothermic or endothermic: magnesium reacting with acid?

    • A. exothermic
    • B. endothermic

  9. Question 9

    In an exothermic reaction, the energy of the products is…

    • A. lower than the energy of the reactants
    • B. higher than the energy of the reactants
    • C. exactly the same as the reactants
    • D. zero

  10. Question 10

    The temperature of a reaction mixture changes from 21 °C to 40 °C. What is the temperature change? (Use a minus sign for a fall.)

    Answer°C

  11. Question 11

    Is this exothermic or endothermic: burning methane?

    • A. exothermic
    • B. endothermic

  12. Question 12

    Breaking chemical bonds…

    • A. gives out energy (exothermic)
    • B. creates new atoms
    • C. takes in energy (endothermic)
    • D. has no energy change

  13. Question 13

    The temperature of a reaction mixture changes from 21 °C to 44 °C. What is the temperature change? (Use a minus sign for a fall.)

    Answer°C

  14. Question 14

    Is this exothermic or endothermic: thermal decomposition of calcium carbonate?

    • A. exothermic
    • B. endothermic

  15. Question 15

    A self-heating can of coffee uses which kind of reaction?

    • A. photosynthesis
    • B. exothermic
    • C. endothermic
    • D. nuclear

  16. Question 16

    The temperature of a reaction mixture changes from 22 °C to 45 °C. What is the temperature change? (Use a minus sign for a fall.)

    Answer°C

All done? Color in the animal! · Free from eurekami.com/math

for the adult only

Answer key: Exothermic and endothermic reactions

  1. 1. 9 °C

  2. 2. B. endothermic

  3. 3. C. exothermic

  4. 4. 17 °C

  5. 5. A. exothermic

  6. 6. A. the minimum energy particles need to react when they collide

  7. 7. -7 °C

  8. 8. A. exothermic

  9. 9. A. lower than the energy of the reactants

  10. 10. 19 °C

  11. 11. A. exothermic

  12. 12. C. takes in energy (endothermic)

  13. 13. 23 °C

  14. 14. B. endothermic

  15. 15. B. exothermic

  16. 16. 23 °C