Signs of chemical reactions may be:
- Gas release
- Formation of a precipitate
- Change of color
- Change of odor
- Change of pH
- Change of aspect
- Change of viscosity
- Change of the temperature
- Visible formation of new compounds.
The change of color may be a sign of a chemical reaction.
Change of color
The release of a gas can be a sign for a chemical reaction.
No, evaporation is a physical change and not a sign of a chemical change. Evaporation involves the change of a substance from a liquid to a gas without altering its chemical composition.
garbage rotting is a chemical change because the odour becomes different which is considered a sign of chemical change.
It is a chemical change because it leaves a residue (which is a sign of chemical change) Hope that helps
After a physical change the molecule remain intact.After a chemical change the molecule is modified.
Burning is a sign of a chemical change
garbage rotting is a chemical change because the odour becomes different which is considered a sign of chemical change.
pretty sure its a chemical change.
smell
The production of smoke from something burning would be a sign of a chemical change. Broken pieces, change in shape, or change in state are all physical changes.