Chemical Kinetics (5/8) Flashcards
1
Q
Chemical Kinetics graph
A
end of the line is below the start= products are favored and spontaneous (-G)
2
Q
Arrhenius equation
A
K=Ae^(-E_a/RT)
3
Q
Enzyme
A
Biological catalysts reduce the activation energy of a reaction
- stabilizes
- weakens bonds
- increases collisions
- donates electron density
- DOES NOT change enthalpy or ∆G (cannot make a reaction spontaneous)
4
Q
heterogeneous and homogeneous
A
Heterogeneous= different phase than reactants Homogeneous= Same phase as reactants
5
Q
For an endothermic reaction
A
The reactants are lower in energy than the products, the transition state is higher in energy than the products, the reaction has a positive ∆H
6
Q
Rate law
A
Math expression for the relationship between [r] and rate of reaction
7
Q
Rate equation
A
rate= K[A]^x[B]^y
8
Q
Units of third order reaction
A
1/(M^2*s)
9
Q
Units of second order reactin
A
1/(M*s)
10
Q
Units of first order reaction
A
1/s
11
Q
Units of 0th order reaction
A
M/s
12
Q
Solving for activation energy
A
The difference in energy between the reactants and the transition state
