The document discusses chemical changes and reactions that occur during food processing. It defines a chemical reaction as a process where reactants are converted into products, and outlines the key parts of a chemical reaction including reactants, products, and signs that indicate a reaction occurred through the formation of new substances, evolution of gas or heat, color changes, etc. Common types of chemical reactions in food processing are described as single replacement, double replacement, synthesis, decomposition, and combustion.

1. Chemical
Changes/Reaction
Changes Occurring in Food Processing

2. Objectives
• Content Standard
• Explain the different process that occurs in food processing.
• Performance Standard
• Choose one way of preserving foods and explain the changes
that occurs during the preservation, storage and utilization
• Learning Competencies
• Discuss the changes occurring during food processing, storage
and utilization

3. Unpacked Learning Competencies
•Explain chemical changes
•Discuss the different type of chemical
reaction
•Identify which among these chemical
reaction is common in food processing.

4. Elicit
•3 volunteers to discussed
what they have learned
from the previous lesson
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Unknown Author is
licensed under CC
BY-SA-NC

5. Engage

6. Explore
•What can you infer in the video that you
have just watched?
•Could this chemical reaction will also be
found in food processing? Explain your
answer.

7. Explain
• Chemical Reaction
• A process in which one or more substances, the
reactants, are converted to one or more different
substances, the products.
• Substances are either chemical elements or
compounds.
• A chemical reaction rearranges the constituent
atoms of the reactants to create different
substances as products.

8. Explain
• Chemical Reaction

9. Parts of a Chemical Reaction
Reactants Products
• Reactants
• A substance that takes part in and undergoes change during a
reaction.
• Products
• Substances created by the chemical change (new bonds form).

10. Parts of a Chemical Reaction
• Reads as “Yields”
• (s) Solid
• (l) Liquid
• (g) gas
• (aq) aqueous solution (the substance is dissolved in H2O)
• (+) Substance is added
• ( ) Heat is added

11. Parts of a Chemical Reaction
• Catalyst Catalysts is added
• Inhibitor Inhibitors is added
• ( ) Evolution of gas
• ( ) Precipitate is form

12. Evidences of
Chemical Reaction
• Formation of
new
substance
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13. Evidences of
Chemical Reaction
• Evolution of
Light/Heat

14. Evidences of
Chemical Reaction
• Change in
temperature
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15. Evidences of
Chemical Reaction
• Evolution
of gas
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16. Evidences of
Chemical Reaction
• Formation
of
precipitate
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17. Evidences of
Chemical Reaction
•Change in
color
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18. Elaborate
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19. Types of Chemical Reactions
•Single Replacement (Displacement) (Redox)
•Double Replacement (Displacement)
(Metathesis)
•Synthesis (Combination)
•Decomposition
•Combustion

20. Types of Chemical Reactions
•Single Replacement (Displacement) (Redox)
•Double Replacement (Displacement)
(Metathesis)
•Synthesis (Combination)
•Decomposition
•Combustion