Write one equation each for decomposition reactions where energy is supplied in the form of heat, light, or electricity.
Answer:
(a) Thermal Decomposition:
When heat is used to decompose a substance.
CaCO3 (calcium carbonate) → CaO (calcium oxide) + CO2 (carbon dioxide)
Substances Involved:
- Calcium carbonate (CaCO3)
- Calcium oxide (CaO)
- Carbon dioxide (CO2)
(b) Decomposition by Light:
When light is used to decompose a substance.
2 AgCl (silver chloride) → 2 Ag (silver) + Cl2 (chlorine)
Substances Involved:
- Silver chloride (AgCl)
- Silver (Ag)
- Chlorine (Cl2)
(c) Decomposition by Electricity:
When electricity is used to decompose a substance.
2 H2O (water) → 2 H2 (hydrogen) + O2 (oxygen)
Substances Involved:
- Water (H2O)
- Hydrogen (H2)
- Oxygen (O2)