E1.3 Basic Stoichiometry - Constant Pressure

Example 1.3: A reaction proceeds in a reactor operated under constant pressure conditions.

The concentration of the components is as follows: C_Ao = 6 mol/L, C_Bo = 15 mol/L, C_Co = 20 mol/L, C_Wo = 0.8 mol/L, C_Zo = 1.2 mol/L, and inerts, C_Io = 7 mol/L. The stoichiometric coefficients are b = 2, c = 3, w = 4, and z = 5. If 60 % of A is converted, calculate the composition of the product.

Solution: The reaction is conducted at constant pressure.

Conversion, X_A = 0.6

Initial moles, N_o = N_Ao + N_Bo + N_Do + N_Wo + N_Zo + N_Io = 50

Number of moles produced at complete conversion of limiting reactant (Equation 1.17):

Fractional volume change, ε (Equation 1.15):

Stoichiometric concentration ratio of B, M (Equation 1.5):

Stoichiometric concentration ratio of C, N (Equation 1.6)

Stoichiometric concentration ratio of W, R (Equation 1.7)

Stoichiometric concentration ratio of Z, S = 0.04 (Equation 1.8)

Concentration of A, C_A (Equation 1.9):

Concentration of B, C_B (Equation 1.10):

Concentration of C, C_C (Equation 1.11):

Concentration of W, C_W (Equation 1.12)

Concentration of Z, C_Z (Equation 1.13)

Concentration of I, C_I (Equation 1.14)