ChemJournal

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ChemJournal

Chemical changes

What is chemical change?

Chemical changes is the breaking and forming of bonds between different bonds. It occurs when particles of the original materials collide with one another. Some exothermic reactions may be hot enough to cause certain chemicals to also undergo a change in state.

Done by:Xavier Chong ( 34 )

Evidence of chemical change

- Change of odour- Change of color - Change in temperature or energy- Change of form - Light, heat, or sound is given off.- Formation of gases- Formation of precipitate - The decomposition of organic matter

Difference between physical and chemical changes

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