Which one of the following changes would alter the rate constant (k) for the rea

Question

Which one of the following changes would alter the rate constant (k) for the reaction 2A + B products? a. increasing the concentration of A b. increasing the concentration of B c. increasing the temperature d. measuring k again after the reaction has run for a while For the chemical reaction system described by the diagram below, which statement is true? 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. The half life for a first order reaction is 27 min. How long will it take for 4 half lives to occur? a. 53.000 min b. 108 min c. 81 min d. 260 min e. Not enough information given

Explanation / Answer

5. Answer: option c

Rate constant of a reaction depend only on temperature according to Arrhenius equation( k=Ae-Ea/RT).

Rate constant increase with increased temperature

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