Physical Properties (HSC SSCE Chemistry): Flashcards

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Physical Properties
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Physical properties

Observed without changing substance identity

Chemical properties

Associated with reactions that transform the substance

Homogeneous substances

Uniform composition throughout

Heterogeneous substances

Non-uniform composition, distinguishable components

Melting point

Lowest temp solid becomes liquid at standard pressure

Pure substance melting behaviour

Sharp - occurs at one specific temperature

Boiling point

Lowest temp liquid boils at stated pressure

Volatile substances

BP <100circ< 100^circC, evaporate rapidly

Density formula

density=massvolume\text{density} = \frac{\text{mass}}{\text{volume}}

Freezing point vs melting point

Freezing point equals melting point of same substance

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