+A **unit operation** is a fundamental step within a [Chemical Process](/wiki/chemical_process) where physical changes occur. These individual operations, such as [Distillation](/wiki/distillation) or mixing, are the building blocks for creating industrial systems and products.
+## See also
+- [Heat Transfer](/wiki/heat_transfer)
+- [Mass Transfer](/wiki/mass_transfer)
+- [Fluid Flow](/wiki/fluid_flow)
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