The second activity in the study of kinetics has students examine rates of reactions when two reactants are involved. Students explore a variety of combinations (eg. first order in both reactants, first order in A and second order in B, etc.) STELLATM software is needed to view the model in Mac (hqx) format or PC format. [Diagram Level | Equations Level | Graphs ] Amount_A(t) = Amount_A(t - dt) + (- rate_A_reacts) * dt INIT Amount_A = 20 OUTFLOWS: rate_A_reacts = .1 * Amount_A * Amount_B Amount_B(t) = Amount_B(t - dt) + (- rate_B_reacts) * dt INIT Amount_B = 20 OUTFLOWS: rate_B_reacts = .05 * Amount_A*Amount_B Time Specs Range: 0-12 , dT = 0.25 , Integration Method = Euler

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