Chapter 14 Review Determine an average rate and compare relative rates for the reaction: A 2  2 A Time0 min3 min6 min [A 2 ]0.2000.1420.101 What is the.

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Chapter 14 Review Determine an average rate and compare relative rates for the reaction: A 2  2 A Time0 min3 min6 min [A 2 ] What is the average rate of disappearance for t=0min to t=3min? What is the average rate of appearance for the product A from t=3min to t=6min?

Chapter 14 Review Given the following set of experiments, determine the Rate Law and value of the rate constant, k. [NO][H 2 ]Initial Rate (M/s) E E E-5

Chapter 14 Review Use both the first and second order integrated rate equations. Ex) The decomposition of ethyl chloride is first order with a rate 2.6 E-3/s. If an initial concentration of M decomposes for 5.5 minutes, then how much ethyl chloride remains?

Chapter 14 Review Given concentration versus time data, determine whether the reaction is first or second order. Time[CH 3 COOCH 3 ] 0.00min M 3.00min M 4.00min M 5.00min M 6.00min M

Chapter 14 Review Use the Arrhenius Equation. Ex) The Activation Energy for a reaction is 55kJ/mol. The rate constant at 298K is found to be 0.25/s. What is the rate constant at 348K?

Chapter 14 Review Given a mechanism, determine the overall reaction, the rate law, and identify catalysts and reaction intermediates. Step 1: NO 2 Cl  NO 2 + Cl (slow) Step 2: NO 2 Cl + Cl  NO 2 + Cl 2 (fast)

Chapter 15 Review Write a K expression for a reaction. 2 NO (g) + Br 2(g)  2 NOBr (g) Evaluate a K if given equilibrium concentrations. Ex) At equilibrium, [NO] = 0.050M, [Br 2 ] = 0.075M, and [NOBr] = 0.022M.

Chapter 15 Review Relate K c to K p given one or the other. For the reaction below, K c is 1.1 x at 300C. What is the value of K p ? CO (g) + 2H 2(g)  CH 3 OH (g)

Chapter 15 Review Use stoichiometry to find K. A 1.50L vessel was filled with moles of CO and moles of H 2 and allowed to achieve equilibrium at 500K. At equilibrium, the vessel is found to contain moles of CO. What is the equilibrium constant, K c ? CO (g) + 2H 2(g)  CH 3 OH (g)

Chapter 15 Review Determine an equilibrium concentration from initial amounts. For the following reaction at 475K, the value of the equilibrium constant is 62. If moles of H 2 and moles of Br 2 are added to a 2.0L vessel, then what is the equilibrium concentration of HBr? H 2(g) + Br 2(g)  2 HBr (g)

Chapter 15 Review Calculate a reaction quotient, Q, and determine the direction of movement. Q > K; reaction shifts to left Q < K; reaction shifts to right Q = K; reaction at equilibrium

Chapter 15 Review Know the effect of LeChatelier’s Principle on a reaction. N 2 O 4(g)  2 NO 2(g) What happens if: More NO 2(g) is added? Some N 2 O 4(g) is removed? The pressure is increased? If the temperature increase, more NO 2(g) is produced. Is the reaction endo- or exothermic?