A thermal reaction is a kind of chemical reaction that happen as a consequence of an increase in temperature. The rise of temperature cause increase to kinetic energy of the particles resulted in higher number of collision which can lead to a thermal reaction.
Examples of Thermal reaction
Thermal reaction has many examples some of these is given below :
- Combustion reactions:
- Polymerization reactions:
- Decomposition reactions:
1. Combustion reactions:
Combustion reactions,include the burning of a fuel in company of oxygen. Examples
- Involve the combustion of gasoline in an automobile engine
- or the burning of methane for heating and cooking.
2. Polymerization reactions:
Polymerization reactions include the addition of monomers to form polymers. For example,
- the production of polyethylene from ethylene monomers is a thermal polymerization reaction.
3. Decomposition reactions:
Some chemical compounds decompose when heated,and a reaction is called decomposition reaction. For example,
In formation of cement,calcium carbonate decays into calcium oxide and carbon dioxide on giving heat.
Difference between thermal and photochemical reaction
|1. Thermal reactions are driven by heat energy.
|Photochemical reactions are driven by light energy.|
|Thermal reactions usually occur at higher temperatures.||Photochemical reactions typically occur at low temperatures.|
|Thermal reaction usually need a higher activation energy.||Photochemical reactions usually have a lower activation energy.|
|Thermal reaction most oftenly occur at slower rate.||Photochemical reactions usually occur at a much faster rate.|
|2. Thermal reactions typically involve stable reactants.
|Photochemical reactions often involve highly reactive and unstable species such as free radicals and excited states.|
|3. Thermal reactions typically produce products that are thermodynamically favored.
|Photochemical reactions often produce products that are not thermodynamically favored by thermal reactions. These products may be more highly oxidized or reduced than the starting materials.|
|4. Thermal reactions are often less selective and can produce multiple products.
|Photochemical reactions often exhibit high selectivity, meaning that they produce specific products with little or no side reactions.|