1. Reaction Type Based on Phases
1.1. Homogeneous Reaction
1.1.1. Reactants and products in the same phase.
1.1.1.1. Example: 2NO+O2 → 2NO2
1.2. Homogeneous Catalytic Reaction
1.2.1. Catalyst in the same phase as the reactants.
1.2.1.1. CH3OH+CH3COOH⇋ CH3COOCH3+H2O (liquid phase)
1.3. Heterogeneous Reaction
1.3.1. Reactants and products in different phases.
1.3.1.1. C+O2→CO2 (solid and gas)
1.4. Heterogeneous Catalytic Reaction
1.4.1. Catalyst in a different phase from the reactants.
1.4.1.1. SO2+O3→ 2SO3
2. Role of Catalyst
2.1. Catalytic Reaction
2.1.1. Reaction occurs with a catalyst
2.1.1.1. C2H2+2H2→ C2H6
2.2. Non-Catalytic Reaction
2.2.1. Reaction occurs without a catalyst.
2.2.1.1. 2NO+O2→ 2NO2
3. Molecularity of Reactions
3.1. Unimolecular Reaction
3.1.1. Involves a single molecule.
3.1.1.1. C6H6(CH3)2→C6H6+C3H6
3.2. Bimolecular Reaction: .
3.2.1. Involves two molecules colliding.
3.2.1.1. 2HI→I2+H2
3.3. Termolecular Reaction:Involves
3.3.1. Involves three molecules reacting.
3.3.1.1. 2NO+O2→ 2NO2
4. Heat Effects
4.1. Exothermic Reaction
4.1.1. Releases Heat.
4.1.1.1. CO+2H2→ CH3OH
4.2. Endothermic Reaction
4.2.1. Absorbes Heat
4.2.1.1. C2H5OH+CH3COOH→ CH3COOC2H5+H2O
5. Reversibility of Reactions
5.1. Reversible Reaction
5.1.1. CH3OH+CH3COOH⇋ CH3COOCH3+H2O (liquid phase)
5.2. Irreversible Reaction
5.2.1. CH3OH→ C2H4+H2O
6. Order of Reactions
6.1. First-Order Reaction
6.1.1. Reaction rate depends on one reactant.
6.1.1.1. 2NO→ 2NO2+23O2
6.2. Second-Order Reaction
6.2.1. Reaction rate depends on two reactants.
6.2.1.1. CH3COOC2H5+NaOH→ CH3COONa+C2H5OH
6.3. Third-Order Reaction
6.3.1. Reaction rate depends on three reactants.
6.3.1.1. 2NO+H2→ N2O+H2O