Question

d listing r. (Individ For a particular first-order reaction, it takes 24 minutes for the concentration of the reactant to decrease to 25% of its initial value, what is the value for rate constant (in S-1) for the reaction? A) 2.0-104 s-1 B)9.6 x 10-4 s-1 C) 1.2 × 10-2 s-1 D)5.8 102s-1 12. In the first order reaction A → products, [A1-0.400 M initially and 0250 M after 15.0 mun, what willl after 175 min? e A) 1.67-10-3 M B) 104 10-3 M C)3.70x 10-2 M D) 6024 K 10-3 M E) 231 10-1 M 13. The the activation energy for this reaction? A) -25.8 kJ/mol B)-38.8 kJ/mol C) 347 kJ/mol D) 25.8 kJ/mol E) 38.8 kJ/mol 14. For the chemical reaction system described by the diagram below, which statement is true? Energy Reaction Progress A) The forward reaction is endothermic B) The activation energy for the forward reaction is greater than the activation energy for the reverse reaction. C) At equilibrium, the activation energy for the forward reaction is equal to the activation energy for the reverse reaction. D) The activation energy for the reverse reaction is greater than the activation energy for the forward reaction. E) The reverse reaction is exothermic. 15. If a catalyst is added to a reaction: D the value of k is increased II) the value of k is decreased III) the rate is increased IV) the rate is decreased V) neither rate nor the constant are changed, only the order A) I and IV B) II and IV C) II and III D) I and III E) V only Page 3 of 4 Problem Set 5 Chemistry 101, Winter 2019

Answer 1

Page No kと kt ha /2 lyyos 2 judo s x 2:30 = 0.00096