Question

properties of chemical reaction change in state with example

Answer 1

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Chemical reaction. ... Chemical reactions must be distinguished from physical changes. Physical changesinclude changes of state, such as ice melting to water and water evaporating to vapour. If a physical change occurs, the physical properties of a substance will change, but its chemical identity will remain the same.

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Answer 2

the changing of colour of a substance is not necessarily an indicator of a chemical change.

For example: changing of a colour of a metal,
formation of gas,temperature change, door change....


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