Chemical KineticsForward and Reverse Activation Energies36Choose the best answerIf Ef and Er are the activation energies of the forward and reverse reactions, respectively, and the forward reaction is exothermic:AEf > ErBEf < ErCEf = ErDNo relationship exists Like 0 Discuss 0Share
Chemical KineticsForward and Reverse Activation Energies37Choose the best answerFor the exothermic reaction H₂ + Cl₂ → 2HCl, ΔH < 0. If Ef and Er are the forward and reverse activation energies, respectively:AEf > ErBEf < ErCEf = ErDΔH is unrelated to Ef and Er Like 0 Discuss 0Share
Chemical KineticsInstantaneous and Average Rate38Choose the best answerThe average rate approaches the instantaneous rate when the time interval:ABecomes very largeBBecomes negativeCApproaches zeroDBecomes exactly one second Like 0 Discuss 0Share
Chemical KineticsFractional-Order Reactions39Choose the best answerIn the commonly cited kinetic example of conversion of chloroform to carbon tetrachloride, the reaction order is:A1B1.5C2D3 Like 0 Discuss 0Share
Chemical KineticsEffect of Concentration on Collision Frequency40Choose the best answerIncreasing the concentration of reactants mainly increases:AHeat of reactionBThreshold energyCCollision frequencyDActivation energy Like 0 Discuss 0Share