1,200 Determine the forward activation energy and change in for a reaction from the graph below. A) Ea =D 1000 kJ/mol, ΔH =D +200 kl/mol enthalpy 1,000 800 B) Ea = 600 kJ/mol, AH = +400 kJ/mol C) Ea = 600 kJ/mol, AH = -400 kJ/mol D) Ea = 1000 kJ/mol, AH = +800 kJ/mol E) Ea = 400 kJ/mol, AH = -400 kJ/mol %3D 600 %3D 400 200 Reaction progress Energy (kJ/mol)

The graphs below are plots of ln k vs. 1/T for different chemical reactions, A and B.  Which reaction has the larger Activation energy, A (red) or B (black)? Why?

Question 6 of 25 Submit An experimental plot of In(k) vs. 1/T is obtained in lab for a reaction. The slope of the best-fit line for the graph is -4215 K. What is the value of the activation energy for the reaction in kJ/mol? kJ/mol 1 2 3 C 7 9. +/- x 10 0 LO 00

reaction CH;OH + Br– C‚H;Br + OH is shown below: E (kJ) C2HSBR+ OH 161 71 CaHOH + Br Reaction Coordinate Which of the following are true? Choose all that apply. The magnitude of Ea for the reverse reaction is smaller than 161 kJ. O The energy of the products is higher than the energy of the reactants. O If the energy of the activated complex were increased, AE would increase. O AE is negative.

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Given the following values of the enthalpy (DH) and activation energy (Ea) of four different reactions, identify an exothermic reaction that would exhibit the fastest rate at 298 K. (Assume that all reactants have the same initial concentration and the same Arrhenius frequency factor A in k = Ae-Ea/RT).   (A) DH = +45 kJ/mol;    Ea = 75 kJ/mol;             (B) DH = +35 kJ/mol;    Ea = 65 kJ/mol; (C) DH = -35 kJ/mol;     Ea = 75 kJ/mol; (D) DH = -45 kJ/mol;    Ea = 65 kJ/mol;

The activation energy of the forward reaction 96.27 kJ/mol and the activation energy for the reverse reaction is 60.33 kJ/mol. What is the DH of the reaction?  78.3 kJ/mol    17.97 kJ/mol  -156.6 kJ/mol  35.94 kJ/mol

Given the following data for the reaction AB, determine the frequency factor, A, of the reaction to three significant figures. k(5¹) 0.730 0.739 T(K) 2.50 102 4.50 x 10² a) -0.287 s1¹ b) 2.05 ¹ Od 0.719 s¹¹ d) 0.287 s e) 0.750 1

A reaction has the following thermodynamic data.   DHºrxn =  - 25 kJ/mole; Ea = 233 kJ/mole   (a) Draw and label a reaction profile for this reaction.   (b) Use a dashed curve to show the effect of a catalyst on this reaction.   (c) What is the activation energy for the reverse reaction?