Kinetics Flashcards
What is the rate equation?
=K[A]^x[B]^y
What is the order of reaction?
The power of a reactants concentration in the rate equation
What is the overall order of reaction?
The sum of the powers of the reactant concentrations
What is the rate constant (k)?
The constant of proportionality in the rate equation
What is the rate of reaction?
The decrease in concentration of reactants per unit time.
OR
The increase in concentration of products per unit time
What does it mean if the reaction is first order?
Whatever happens to the concentration also happens to the rate of reaction i.e. double the concentration= double the rate
What does it mean if the reaction is second order?
If the concentration double the rate will double i.e. the rate is the squared sum of whatever happens to the concentration
What does it mean if the reaction is zero order?
The change in concentration has no effect of the rate
What is the rate determining step?
The slowest step in a chemical reaction which determines how fast a reaction is. Change in rate of this step will effect the overall rate in the reaction. Changing the rate of fast steps will not.
What 2 factors do not effect the rate constant?
1) Pressure
2) Concentration
What factors can change the rate constant?
1) Change in temperature or addition in catalyst
If the temperature is increased the rate constant increases and if a catalyst is added then the rate constant will also increase
When would you use the Arrhenius equation?
When you have a change in temperature or an addition of a catalyst that effects the rate constant.
What is the Arrhenius equation?
k=Ae^-(Ea/RT) k= rate constant A= Frequency factor e= Constant (2.718) Ea= Activation energy R= Gas constant T= Temperature
