# Kinetics

## 7 terms · MCAT Book

### Instantaneous Rate

delta[reactant]/deltat
deltat is a very small increment of time
this is seen as the tangent to the curve at any point

### As the [A] is changed, the rate does not change. The rate is __. The order with respect to A is __.

Unaffected
0
The graph is a straight line with no slope ([A] vs rate)

### As the [A} is changed, the rate changes proportionally. If [A] is doubled, the rate ___ and so on. The order with respect to A is __.

Doubled
1
the graph has a slope of 1

### As the [A] is changed, the rate changes as the square of the change in the concentration. If [A] is doubled, the rate ___ and so on. The order with respect to A is __.

2
the graph increase exponentially

### First-order reaction overall equation

ln[A]o=kt[A]subt
or
ln([A]o/[A]subt)=kt

ln2=kt1/2
0.693=kt1/2

### Arrhenius equation

lnk2/lnk1=Ea/R(1/T1-1/T2)
R=8.314j/mole*K