:F<sub>j0</sub> is the molar flow rate into the system of species j
:F<sub>j0</sub> is the molar flow rate into the system of species j
:F<sub>j</sub> is the molar flow rate out of the system of species j
:F<sub>j</sub> is the molar flow rate out of the system of species j
−
:r<sub>j</sub> is the [[rate equation|rate of appearance]] of species j<ref>Since the design equation is performed on a reactant, the rate of appearance is actually negative. For this reason -r<sub>j</sub> is often substituted, to represent dissapearance of the reactant.</ref>
+
:r<sub>j</sub> is the [[rate of reaction|rate of appearance]] of species j<ref>Since the design equation is performed on a reactant, the rate of appearance is actually negative. For this reason -r<sub>j</sub> is often substituted, to represent dissapearance of the reactant.</ref>
:V is [[volume]] in which the reactor takes place
:V is [[volume]] in which the reactor takes place
:N<sub>j</sub> is the number of [[mole]]s of species j
:N<sub>j</sub> is the number of [[mole]]s of species j