The release of a gas can be a sign for a chemical reaction.
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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.
No, evaporation causes a change in the state of matter (liquid to solid) which is a physical change
The change of color may be a sign of a chemical reaction.
Some signs are: change of the color, release of a gas, change of the temperature, formation of a precipitate, pH modification, viscosity variation, a change of the odor or taste, etc.
Change of color
It is a chemical change because it leaves a residue (which is a sign of chemical change) Hope that helps
garbage rotting is a chemical change because the odour becomes different which is considered a sign of chemical change.
Depends on the gas. Producing acetylene (a gas used in welding) is a chemical change; producing steam (a gas used for many industrial purposes, as well as building heat) is a physical change.
After a physical change the molecule remain intact.After a chemical change the molecule is modified.
garbage rotting is a chemical change because the odour becomes different which is considered a sign of chemical change.
Burning is a sign of a chemical change