Consider two reactions, A and B. Reaction A has a higher activation energy than reaction B. Which statement is most likely true?
Reaction A will proceed faster than reaction B at the same temperature.
Both reactions will proceed at the same rate at the same temperature.
Reaction B will proceed faster than reaction A at the same temperature.
The relative rates of reactions A and B cannot be predicted based on activation energy alone.
Related Questions
The rate of reaction increases with temperature due to
Decrease in activation energy
Increase in activation energy
Increase in collision frequency
Increase in concentration
Effective collisions are those in which molecules must:
Have energy equal to or greater than the threshold energy
Have proper orientation
Acquire the energy of activation
All of the above
A reaction between gases X and Y follows the rate law: Rate = k[X]Β²[Y]. If the concentration of X is tripled and the concentration of Y is halved, the new rate will be:
1.5 times the original rate
4.5 times the original rate
9 times the original rate
0.75 times the original rate
Which increases on increase of temperature?
Rate of reaction
Activation energy
Equilibrium constant for an exothermic reaction
Concentration of reactants
Increasing the temperature generally increases the reaction rate because:
The activation energy decreases
More molecules have sufficient energy to react
The concentration of reactants increases
The molecules become larger
A reaction between gases A and B has an activation energy of . If a catalyst is added that lowers the activation energy to , what effect will this have on the reaction rate?
The reaction rate will decrease.
The reaction rate will remain unchanged.
The reaction rate will increase slightly.
The reaction rate will increase significantly.
The minimum energy required for a reaction to occur is called:
Kinetic energy
Potential energy
Activation energy
Ionization energy
In gaseous reactions important for the understanding of the upper atmosphere and react bimolecularly to form two radicals. for this reaction is and is , then for the bimolecular recombination of two OH radicals to form and is:
Activation energy of a reaction is:
The energy released during the reaction
The energy evolved when activated complex is formed
Minimum amount of energy needed to overcome the potential barrier of reaction
The energy needed to form one mole of the product
