Collision theory and rates of reactions Flashcards
(10 cards)
What needs to happen for a reaction to take place?
There must be a collision between species, correct orientation, and sufficient kinetic energy.
What is activation energy (Ea)?
The minimum energy required for a reaction to occur is the activation energy (Ea).
How does increasing temperature affect the rate of reaction?
Increasing temperature raises kinetic energy, leading to more collisions and higher reaction rates.
How does increasing concentration affect the rate of reaction?
Higher concentration increases collision frequency, which raises the rate of reaction.
How does particle size affect the rate of reaction?
Smaller particle size increases surface area, allowing more collisions and a higher reaction rate.
What is the effect of adding a catalyst?
A catalyst provides an alternative reaction path with lower activation energy, speeding up the reaction.
How does temperature affect the Maxwell-Boltzmann distribution?
At higher temperatures, the curve broadens, showing more particles have sufficient energy to react.
What are the four factors that increase the rate of reaction?
Temperature, concentration (or pressure), particle size, and catalysts.
What conditions are required for two particles to react?
Collisions must happen with proper orientation and enough energy to break existing bonds.
What is the significance of the activation energy in reactions?
Reactions only occur if particles have enough kinetic energy to overcome the activation energy barrier.
