Select the key term that corresponds to the following definitions:
1. The principle that the rate of a chemical reaction is controlled by the frequency and energy of molecules striking each other.
a. Activation energy (E_act)
b. Catalyst
c. Chemical equiLiBrium
d. Collision theory
e. Endothermic reaction
f. Exothermic reaction
g. General equiLiBrium constant (K_eq)
h. Heat of reaction (ΔH)
i. Heterogeneous equiLiBrium
j. Homogeneous equiLiBrium
k. Ionization equiLiBrium constant (K_i)
l. Law of chemical equiLiBrium
m. Le Chatelier's principle
n. Rate of reaction
o. Reaction profile
p. Reversible reaction
q. Solubility product equiLiBrium constant (K_sp)
r. Transition state
1) Activation energy (E_act)
2) Catalyst
3) Chemical equiLiBrium
4) Collision theory
5) Endothermic reaction
6) Exothermic reaction
7) General equiLiBrium constant (K_eq)
8) Heat of reaction (ΔH)
9) Heterogeneous equiLiBrium
10) Homogeneous equiLiBrium
11) Ionization equiLiBrium constant (K_i)
12) Law of chemical equiLiBrium
13) Le Chatelier's principle
14) Rate of reaction
15) Reaction profile
16) Reversible reaction
17) Solubility product equiLiBrium constant (K_sp)
18) Transition state
