Rate Equations Flashcards
What is the rate of resction?
The change in concentration of a substance in a given time
What is rate of reaction measured in?
Moldm-3 s-1
What is activation energy?
The minimum energy required to start a reaction by the breaking of bonds
In rate equations, what do the powers of the reactions indicate?
The order of the reaction with respect to that reactant
What is the overall order of a reaction?
The sum of the orders of each reactant
How do you calculate the units of the rate constant K
Units of rate/ units of overall order
What is a rate concentration graph?
Shows how the rate of a reaction is affected by the concentration of a reactant, depending on its order
How does a zero order affect a rate concentration graph?
The change in conc. doesnt affecet rate. Rate remeians the same throughout
How does a first order affect a rate concentration graph?
The graph shows a linear line going through the origin. The change in rate is proportional to the change in concentration.
How does a second order affect a rate concentration graph?
The change in rate is proportional to the change in concentration squared
Line goes through the origin.
What is a concentration time graph?
Shows how the concentration of a reaction changes during the reaction.
What is a concentration time graph?
Shows how the concentration of a reaction changes during the reaction.
How can a conc. time graph be used to calculate the rate of reaction
Gradient= rate
How does a zero order affect a concentration time graph?
The gradient doesnt change, so the rate is constant
How does a first order affect a concentration time graph?
As conc, decreases the rate decreases as the gradient becomes less shallow
