In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. This law meansthat energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another

Definition of the Law of Conservation
The law of conservation refers to fundamental principles in physics and chemistry stating that certain properties remain constant in isolated systems. These properties include mass, energy, and momentum.
Key Principles
- Law of Conservation of Mass:
- States that mass cannot be created or destroyed in a closed system.
- The total mass of reactants equals the total mass of products in a chemical reaction.
- Law of Conservation of Energy:
- Energy cannot be created or destroyed; it can only be transformed from one form to another.
- The total energy in an isolated system remains constant over time.
- Law of Conservation of Momentum:
- In a closed system, the total momentum before an event (like a collision) is equal to the total momentum after the event.
- This principle is crucial in understanding the behavior of objects in motion.
Applications of Conservation Laws
- Chemical Reactions:
- Understanding reactants and products in stoichiometry.
- Physics and Engineering:
- Analysis of collisions and energy transformations in mechanical systems.
- Astronomy:
- Gravitational interactions and orbital mechanics rely on conservation laws.
Conclusion
The laws of conservation are fundamental to science, providing a basis for understanding interactions in the physical world. They emphasize that while forms and states may change, the total quantities of mass, energy, and momentum remain unchanged, guiding the study of various scientific fields.