Rate Equations Flashcards
1
Q
rate equation
A
Rate = k [A]m [B]n
2
Q
total order
A
m + n
3
Q
zero order
A
conc has no effect on rate
4
Q
first order
A
rate is directly proportional to conc
5
Q
second order
A
rate is directly proportional to square of conc
6
Q
rate constant increases when
A
temp increases
bigger k = faster reaction
7
Q
Arrhenius equation
A
k = Ae ^ -Ea/RT
k = rate constant A = Arrhenius constant e = mathematical constant Ea = activation energy R = gas constant T = temp/K
8
Q
what are the rate constant and rate of reaction directional proportional to?
A
molecules with E > Ea
9
Q
higher temp = ?
A
higher rate constant
higher rate of reaction
10
Q
Arrhenius rearranged
A
lnk = lnA - Ea/RT
11
Q
increased Ea = ?
A
decreased k
12
Q
gradient
A
- Ea/R
13
Q
y intercept
A
lnA
14
Q
y = mx + c
A
lnk = (-Ea/R) (1/T) / lnA
15
Q
why do we use initial rate
A
exact conc of reactants is known
