What is the Difference Between Eutectic and Eutectoid Reaction?
🆚 Go to Comparative Table 🆚The main difference between eutectic and eutectoid reactions lies in the phase transitions involved in each process. Here's a comparison of the two reactions:
Eutectic Reaction:
- In this type of reaction, a liquid state with a fixed composition solidifies into two solids at a constant temperature.
- It is a three-phase reaction, where, upon cooling, a liquid transforms into two solid phases at the same time.
- A eutectic system is a homogeneous mixture of substances that can melt or solidify at a certain temperature, known as the eutectic temperature.
Eutectoid Reaction:
- In this type of reaction, two different solids transform into a third solid at a constant temperature.
- It is a two-phase reaction, where a solid transforms into two other solid phases at the same time upon cooling.
In summary, a eutectic reaction involves a liquid transforming into two solid phases, while a eutectoid reaction involves two solid phases transforming into a third solid phase at a constant temperature.
Comparative Table: Eutectic vs Eutectoid Reaction
The main difference between eutectic and eutectoid reactions lies in the phases involved in the reactions. Here is a table comparing the two types of reactions:
| Feature | Eutectic Reaction | Eutectoid Reaction |
|---|---|---|
| Definition | A chemical reaction in which a liquid transforms into two solid phases at the same time. | A chemical reaction in which a solid transforms into two other solid phases. |
| Phases Involved | Liquid and two solid phases. | One solid phase and two other solid phases. |
| Temperature | Occurs at the eutectic temperature, which is the lowest possible melting temperature for the given system. | Occurs at the eutectoid point, which is a specific temperature for the given system. |
| Examples | A eutectic system is a homogeneous mixture of substances that can melt or solidify at a temperature. | Eutectoid reaction of iron is an example, resulting in the formation of pearlite, a mixture of ferrite and cementite. |
In summary, eutectic reactions involve a liquid transforming into two solid phases at a constant temperature, while eutectoid reactions involve a solid transforming into two other solid phases at a specific temperature.
- Eutectoid Reaction vs Peritectic Reaction
- Azeotropic vs Eutectic
- Triple Point vs Eutectic Point
- Heat of Solution vs Heat of Reaction
- E1 vs E2 Reactions
- Homogeneous vs Heterogeneous Reactions
- Heat of Formation vs Heat of Reaction
- Endothermic vs Exothermic Reactions
- Catalytic vs Non Catalytic Reaction
- Fusion vs Solidification
- Heat of Fusion vs Crystallization
- Synthesis Reaction vs Substitution Reaction
- Deep Eutectic Solvents vs Ionic Liquids
- Nuclear Reaction vs Chemical Reaction
- Synthesis Reaction vs Dissociation Reaction
- Electrocyclic vs Cycloaddition Reaction
- Reactant vs Reagent
- Addition vs Substitution Reaction
- Stereospecific vs Stereoselective Reactions