'''''Homogeneous''''' is an adjective that has several meanings.
Homogeneity has a precise meaning in
physics.
In
biology homogeneous has a meaning similar to its meaning in
mathematics. Generally it means "the same" or "of the same quality or general property", such as a homogeneous sample, homogeneous
population, etc.
Homogenous (without the second
e) has a similar meaning of being the same throughout, and is perhaps more common in everyday speech. For example
homogenised milk is
milk which has been processed so that the
cream is mixed throughout the milk, rather than being left to settle at the top.
In
physical chemistry,
homogeneous describes a single-phase system as opposed to
heterogeneous where more than one
thermodynamically distinct phases co-exist. Example: a sugar cube in a glass of water is bi-phasic and heterogeneous, sugar dissolved in water is a homogeneous system. See also
phase diagrams and the classification of catalysts.
See also
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