Types of Chemical Reactions

Identifying Reaction Type

• Combination reactions involve the formation of a single product from multiple reactants.

• Breakdown reactions involve the decomposition of a compound into simpler substances.

• Exchange reactions involve the swapping of elements between compounds.

• All of the above for patterns like combination, breakdown, or exchange of elements.

Example of Combustion Reaction

• @@CH_4 + 2O_2 ightarrow CO_2 + 2H_2O@@

• @@C_3H_8 + 5O_2 ightarrow 3CO_2 + 4H_2O@@

• @@C_2H_5OH + 3O_2 ightarrow 2CO_2 + 3H_2O@@

• @@2H_2 + O_2 ightarrow 2H_2O@@

Example of Decomposition Reaction

• @@2H_2O ightarrow 2H_2 + O_2@@

• @@H_2 + O_2 ightarrow 2H_2O@@

• @@CaCO_3 ightarrow CaO + CO_2@@

• @@2Na + Cl_2 ightarrow 2NaCl@@

Decomposition Reaction

• A reaction where two or more substances combine to form a single compound.

• A reaction where a single compound breaks down into two or more simpler substances.

• A reaction that involves the transfer of electrons between two species.

• A reaction that occurs without any change in the chemical composition of the substances.

Example of Synthesis Reaction

• @@2H_2 + O_2 ightarrow 2H_2O@@

• @@H_2 + O_2 ightarrow H_2O@@

• @@C + O_2 ightarrow CO_2@@

• @@2Na + Cl_2 ightarrow 2NaCl@@

*Front:* Real-Life Application of Combustion

• of fuels in car engines.

• of fuels in power plants.

• of fuels in cooking stoves.

• of fuels in heating systems.

What is a Combustion Reaction?

• A process where a substance combines with oxygen, releasing energy as light and heat.

• A reaction where two substances combine to form a single product without energy release.

• A reaction that absorbs energy and does not involve oxygen.

• A process where a substance decomposes into simpler substances without oxygen.

*Front:* Reaction Energy Changes

• Reactions absorb energy; endothermic reactions release energy.

• Reactions release energy; endothermic reactions absorb energy.

• All reactions are exothermic in nature.

• Endothermic reactions do not involve energy changes.

What is a Synthesis Reaction?

• A reaction where two or more substances combine to form a new compound.

• A reaction that breaks down a compound into simpler substances.

• A reaction that involves the exchange of ions between compounds.

• A reaction that occurs without any chemical change.

Balancing Reaction Equation

• the same number of each type of atom on both sides of the equation.

• the total mass of reactants is greater than the total mass of products.

• the number of molecules of reactants is equal to the number of molecules of products.

• the reaction occurs at a constant temperature.