7. Substance A in the liquid phase produces R and S by the following reactions:
R: r_R = k_1 C_A^2
S: r_S = k_2 C_A
The feed (C_A0 = 1.0, C_R0 = 0, C_S0 = 0.3) enters two mixed flow reactors in series (τ_1 = 2.5 min, τ_2 = 10 min). Knowing the composition in the first reactor (C_A1 = 0.4, C_R1 = 0.2, C_S1 = 0.7), find the composition leaving the second reactor.
Liquid reactant A decomposes as follows:
r_R = k_1 C_A^2, where k_1 = 0.4 m^3/mol·min
r_S = k_2 C_A, where k_2 = 2 min^-1
A feed of aqueous A (C_A0 = 40 mol/m^3) enters a reactor, decomposes, and a mixture of A, R, and S leaves.