Understanding Physical and Chemical Properties: Key Differences and Examples
This guide explores the fundamental differences between physical and chemical properties. Physical properties, such as color, freezing point, and texture, can be observed without altering the substance itself. In contrast, chemical properties are evident only during a chemical reaction, resulting in new materials with different properties. Examples of physical changes include melting, freezing, and dissolving, while chemical changes involve processes like rusting and burning. Learn to identify indicators of chemical reactions, such as gas production and color change.
Understanding Physical and Chemical Properties: Key Differences and Examples
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Presentation Transcript
Reviewing Physical Properties and Changes
Physical Properties can be observed without changing the substance
color freezing point odor brittleness texture malleability density ductility luster state of matter boiling point conductivity taste hardness melting point
A physical change occurs when the appearance of a substance changes, but chemically the substance is the same
Molding a clay ball evaporation (liquid to gas) freezing (liquid to solid) dissolving tearing boiling water Size / shape change melting (solid to liquid)
Chemical Properties
describe the potential of substances to undergo chemical changes…
You can’t actually tell what chemical properties a substance has unless it goes through a chemical change or reaction…
Chemical Changes
The substances created during a chemical reaction are completely different from the original substances!!
The object becomes a whole new material… with NEW and DIFFERENT properties
EXAMPLES: Rusting Burning Cooking
1. A solid precipitate forms 5 INDICATORS OF A CHEMICAL REACTION: Liquid B Liquid A
