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Understanding Mass and Energy Changes in Physical and Chemical Reactions

Explore the conservation of mass and energy during physical and chemical changes like changes of state. Learn through observations, practice questions, and a fun song. Enhance your science knowledge with key terms and activities.

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Understanding Mass and Energy Changes in Physical and Chemical Reactions

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  1. 29. What happens to particles’ mass and energy during physical and chemical changes, like changes of state? Six minutes for Do Now For a great stamp: complete, silent, and properly seated. HW 26 DN 27 CW 27DN 28 DN 29 10/29 A Day @MrLinehan HW or study questions?

  2. 29. What happens to particles’ mass and energy during physical and chemical changes, like changes of state? Six minutes for Do Now For a great stamp: complete, silent, and properly seated. DN 29 DN 27 CW 27DN 28 DN 29 10/29 B Day @MrLinehan HW or study questions?

  3. Agenda • Opening items (with mastery competition) • Do now review • Observation 1: Baking soda & vinegar • Observation 2: Boiling water • Listening in: a song • The bottom line: Cornell notes • Practice • Exit check

  4. Mastery competition update: D28

  5. By the end of class… • Describe the Laws of Conservation of Mass and Energy • Key vocab: • Conservation • Energy transfer • Mass • Energy • Physical/chemical change

  6. The Do Now.Let’s review.

  7. Let’s get ready for the day – set up some Cornell Notes!

  8. Observation 1: Baking soda & vinegar • NaHCO3+CH3COOH NaC2H3O2 + H2O+CO2 • Is this chemical or physical change? • What is the initial mass? • What is the final mass? • What happens to the mass of the entire setup? • Chemical change • Mass stayed the same

  9. Observation 2: Boiling water • Is this physical or chemical change? • What is the initial mass? • What is the final mass? • What happens to the mass of the entire setup? • What type of energy are we adding to the system? • Physical change • Mass stayed the same • We add thermal energy and see an increase in kinetic energy. We see an energy transferfrom the hot plate to the water.

  10. Listening in: a song • Listen to this song by a crazy science teacher carefully • Fill in the blanks in the lyrics on the back of your Do Now Einstein changed up the rules we’re learning today!

  11. The bottom line:The Laws of Conservation of Mass and Energy Law of Conservation of Mass Law of Conservation of Energy Energy may be converted to another form during a physical or chemical change, but the total amount of energy present before and after a change is the same. Energy cannot be created or destroyed. In both chemical and physical changes, the total mass of matter stays the same before and after the change. Matter changes, but mass cannot be created or destroyed.

  12. Element group practice.Complete the practice questions 1-10 on page 94 except 9and12-16a on page 95 except 15of your textbook.You may work with your element group only.Up to two co-teachers may be selected.

  13. Exit check • Work independently • On a separate piece of paper • Write period # at top • Close notebooks • Counts toward mastery competition NOT PUBLISHED ONLINE

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