1. Dissolution and Solvation: When sucrose is dissolved in water, it undergoes a process called solvation. The sucrose molecules are surrounded by water molecules, forming hydrogen bonds and breaking apart the sucrose crystal lattice. This process is physical, not chemical, as the sucrose molecules remain intact.
2. Hydrolysis (at High Temperatures): At temperatures exceeding 100°C (the boiling point of water), sucrose can undergo a process called hydrolysis. This is a chemical reaction where water molecules react with sucrose, breaking it down into simpler sugars, primarily glucose and fructose.
3. Caramelisation: As the solution is heated further, sucrose begins to decompose and caramelize. This is a complex series of chemical reactions involving dehydration, oxidation, and polymerization, resulting in the formation of various compounds that give caramel its characteristic color and flavor.
4. Decomposition: At extremely high temperatures (over 200°C), sucrose will completely decompose into carbon and other byproducts. This is a complex process involving chemical reactions.
In summary:
- The primary process involved in heating a sucrose solution is solvation.
- At higher temperatures, hydrolysis occurs, breaking down sucrose into simpler sugars.
- Continued heating leads to caramelization, a series of complex reactions resulting in the formation of caramel.
- At very high temperatures, decomposition takes place, breaking down sucrose into basic components.
