Operations that involve a physical or chemical change.
Materials that enter the process (feed)
Materials that leave the process (product)
Mass and Volume
Mass per unit volume
grams cubic centimeter, kilogram cubic centimeter, pound mass cubic feet
volume per unit mass
cubic centimeter grams, cubic centimeter kilogram, cubic feet pound mass
Are conversion factors that relate mass and volume
They do not change very much.
They do change often
Ratio of the density (P) of the material to the density of a reference material (water)
Rate at which a material is transported through a process line.
kilograms per second
cubic meters per second
By the density of fluid.
Refers to mixtures. Physical properties depend strongly on the content of each component (composition).