Question

Figure MODEL 1: Dynamic Equilibrium 4 students/min Classroom 123 18 students Classroom 124 35 students 4 students/min KEY QUESTIONS L. Are the students moving from room to room in the modelt? 2. Is the number of students in each room changing 3. In the same way that equilibrium is reached for the students in the above classrooms, chemical equilibrium is reached in reactions when (select one): a) all reactions stop b) the forward reaction stops c) the concentrations of products and reactants become equal d) the rates of the forward and reverse reactions become equal c) the temperature becomes constant Are the concentrations of A, B, C, and D changing if ?00 molecules per second of A and B are being converted into C and D by the forward reaction and 100 molecules per second of C and D are being converted into A and B by the reverse reaction? Explain. 4. 5. What is an example of dynamic equilibrium that you have seen? 216

Answer 1

Yes no (d) for forward rxn: - A + B rightarrow V + D K + f = 100 molecules pressure for backword ren: - C + D rightarrow A + B k_b = 100 molecules per second since during rate A & B are converted to C & D and with the similar rate C & D are again converted to A & B since K_b = K_b Therefore concentration of A & B do not change In state bottles & beverages: - At equilibrium rate of transfer of co_2 from gas to liquid phase is equal to rate from liquid to gas. single phase system: - Dissociation of acetic acid