Physical and Chemical Change in Matter
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The document discusses the differences between physical and chemical changes. It defines physical changes as changes in a substance's physical properties without forming new substances, while chemical changes produce new substances with different chemical and physical properties. It provides examples of physical and chemical changes and notes that chemical changes are irreversible. The document also introduces chemical equations as a way to represent chemical reactions by showing reactants and products.
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Physical and Chemical Change in Matter
- 2. Acid and alkali Properties Physical change Chemical change
- 5. involves changes to the physical properties of a substance without any new substances being formed. Physical change
- 7. Chemical change Produces one or more new substances, which have different physical and chemical properties from the original substance. Reactant- the original substance Product- new substance formed
- 9. Physical change Condition Chemical change No Is there any new substance formed? Yes Yes Is the change reversible? No (not always) Yes, changes in the physical properties Are there any changes in the properties of the original substance? Yes, changes in both chemical and physical properties
- 10. Chemical Equation • Chemical equations are used to describe chemical reactions. • They tell us about the reactants that are involved, as well as the products that are formed at the end of the reaction.
- 11. Carbon dioxide + Glucose + Oxygen Light Chlorophyll Reactants Carbon dioxide and water Products Glucose and oxygen Conditions Light and chlorophyll
- 12. Homework: Bring 3 tablets of ANTACID ( antacil, etc.) Salt water ( if possible) Salt