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Changes & Reactions by Vaishnavi…

- - - - vinegar and baking soda
        
        bubbles= carbon dioxide
    - - milk curdling
        
        solid seperating= precipitate
    - - match burning
        
        match color= black
  - - - composition changes
    - - composition stays same
  - - - into a new substance
- - - - energy
        
        more is required breaking bonds
        
        in reactants
        
        than is released
        
        when product is created
  - - - to approximately 450 degrees
        
        it decomposes in endothermic reaction
      - 2HgO + 181.7kJ -> 2Hg + O2
- - - - releases energy to surroundings
  - - - energy to break reactant's bonds