Chemical Reactions: Transformations of Matter
Chemical reactions involve the rearrangement of atoms to form new substances, highlighting the transformative nature of matter. Distinguishing between physical and chemical changes is crucial, along with understanding the indicators of chemical reactions. By employing various methods, such as balancing equations and recognizing types of reactions, one gains insight into the core principles governing matter's transformation.
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What we have learnt
- Chemical reactions rearrange atoms to create new substances.
- The distinction between physical and chemical changes is essential for understanding chemical processes.
- Indicators such as gas production, color change, and temperature change signal that a chemical reaction has occurred.
- The Law of Conservation of Mass states that mass is conserved in chemical reactions.
Key Concepts
- -- Chemical Reaction
- A process involving the rearrangement of atoms to form new substances.
- -- Reactants and Products
- Reactants are the starting materials for a reaction, while products are the new substances formed.
- -- Balancing Chemical Equations
- The practice of ensuring that the number of atoms for each element is the same on both sides of a chemical equation.
- -- Exothermic and Endothermic Reactions
- Exothermic reactions release energy, while endothermic reactions absorb energy.
- -- Types of Chemical Reactions
- Categorization of reactions based on how reactants transform into products, including synthesis, decomposition, combustion, and displacement reactions.
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