BackPhysical Properties in Chemistry: Definitions, Examples, and Applications
Study Guide - Smart Notes
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Physical Properties
Definition and Overview
Physical properties are measurable characteristics that describe the state of a chemical compound. These properties can be observed through your senses without changing the chemical structure of a substance.
Physical Property: A measurable property that describes the state of a chemical compound.
Physical properties can be observed without altering the chemical identity of the substance.
Main Types of Physical Properties
Physical Property | Examples |
|---|---|
Color | Red, blue, silver, etc. |
Density | Mass per unit volume, e.g., |
Mass | Measured in grams, kilograms, etc. |
Volume | Measured in liters, milliliters, etc. |
Boiling Point (bp) | Temperature at which a substance boils |
Freezing Point (fp) | Temperature at which a substance freezes |
Melting Point (mp) | Temperature at which a substance melts |
Diameter | Width of an object |
Examples and Applications
Example: Mercury is a silver liquid at 25°C. This is a physical property because it describes the state and appearance of mercury without changing its chemical identity.
Example: The density of iron is . This is a physical property because it is a measurable characteristic that does not involve a chemical change.
Practice: Identifying Physical Properties
Physical properties include: color, density, mass, volume, boiling point, freezing point, melting point, diameter.
Not a physical property: Rusting of iron (chemical change), platinum glowing when heated (chemical change), iron bar rusting (chemical change).
Key Points
Physical properties do not involve changes in chemical composition.
They are useful for identifying and classifying substances in chemistry.
Common physical properties are easily measured and observed.
Formulas
Density:
Additional info: Physical properties are fundamental in GOB Chemistry for distinguishing substances and predicting their behavior in different environments.
