AC1: Reaction Kinetics Flashcards
If the concentration of X is changed (whilst all other conditions are kept constant) and the rate is not affected, what is the order of reaction for X
The order of reaction for X is zero order
If the concentration of Y is changed (whilst all other conditions are kept constant) and the rate is affected proportionally, what is the order of reaction for Y
The order of reaction for Y is first order
If the concentration of Z is changed (whilst all other conditions are kept constant) and the rate is affected where the rate change is the square of the concentration change, what is the order of reaction for Z
The order of reaction for Z is second order
State the rate equation
rate = k [Y][Z]^2
For a zero order reaction, describe the graph of time against [reactant]
never goes up, not horizontal, diagonal line going down from left to right
successive half lives DECREASE
For a first order reaction, describe the graph of time against [reactant]
successive half-lives are CONSTANT
How can you work out k (rate constant) from a first order reaction graph, which is time against [reactant]
k = ln2 / first half life
For a second order reaction, describe the graph of time against [reactant]
successive half lives INCREASE
For a zero order reaction, describe the graph of [reactant] against rate
Horizontal line
For a first order reaction, describe the graph of [reactant] against rate
straight diagonal line going from origin to top right
For a second order reaction, describe the graph of [reactant] against rate
similar to exponential graph
How can you work out the units for the rate constant (k)
x = overall order
mol ^(1-x)dm^(3x-3)s^(-1)
What factor(s) affects the rate constant k
Temperature ONLY
