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Define chemical kinetics
The study of how to change the rate of reaction
What is the equation for average rate of reaction
∆c/∆t
What is an indication of a reaction occurring
Production of gas
Colour change
Production of ions
Define collision theory
In order for a reaction to occur the reacting particles must collide
What are the two main stipulations of collision theory
Particles must collide in the right orientation
Particles must collide with the right amount of energy
Define chemical nature
The identities of the reactants
Do weaker or stronger bonds collide more effectively
Weaker
How will concentration affect rate of reaction
Increased concentration increases rate
How will temperature affect rate of reaction
Increased temperature increases rate
(around room temp 10º change can double or triple rate)
How will a catalyst affect reaction rate
Speed up reaction without reacting
How will surface area affect reaction rate
Increased surface area gives more room to react
What does a potential energy diagram show
The energy change that occurs during a chemical reaction including an activation energy “hump”
Define activated complex
A short lived combination molecule with partially broken and partially formed bonds
Is energy of reactants or products higher for exothermic reactions
reactants
Is energy of reactants or products higher for endothermic reactions
products
