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Burning coal is a chemical reaction, a chemical change; but the solid reactant is transformed in gaseous products (H2O and CO2) - this is a physical change.
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∙ 7y ago
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What reactions shows a physical change?
NaCI(s) ---------> NaCI(aq)
Is reactions a chemical or physical?
Chemical reactions are chemical processes.
Is dissolving kool aid in water a chemical or physical change?
Any chemical reactions - a physical phenomenon.
Is mixing coffee with hot water a physical or chemical change?
It is a Chemical change because you can't change it back.
Is denture cleaner tablet a chemical or a physical change?
Cleaning is a physical process but sometimes can involve chemical reactions.
What reactions shows a physical change?
NaCI(s) ---------> NaCI(aq)
Is Making orange slices a Physical change or chemical change?
Chemical reactions
Are physical changes chemical reactions?
No, physical changes normally refer to changes other than chemical reactions. If you have a loaf of bread and cut it in half, that is a physical change but not a chemical change. If you eat the bread and digest it, that is a chemical change.
Can a physical change become a chemical change?
A lot of chemical reactions are initiated by physical changes - specifically, heating something.
Is bleaching a sheet and pillowcase a chemical change or physical change?
These are chemical reactions (changes).
What is chemical and physical reactions?
A physical reaction is were the current substance can be changed in state and then changed back easily to it's previous state, a chemical reaction is the opposite, it is difficult to change it back to its previous state.
Is reactions a chemical or physical?
Chemical reactions are chemical processes.
How ripening of bread pieces a physical change?
It is a chemical change, involving chemical reactions. Only water evaporation is a physical process.
Is pasteurization chemical or physical change?
Pasteurization involve chemical reactions.
Is sleeping a chemical or physical change and why?
Sleeping involve some chemical reactions and physical phenomenons but I suppose that it is exaggerate to consider sleep as a chemical/physical change.
Does smell change with a physical change?
Smell is a physical property. It it caused by small amounts of the airborne substance undergoing chemical reactions with receptors in your nose.The smell of perfume is a physical not a chemical
What are examples of chemical reaction?
Reactions that are not chemical reactions are physical reactions. These reactions involve a change in only the physical state of an element, not its chemical properties. Thus, physical changes include freezing, condensation, sublimation, hammering a metal into a sheet, cutting sodium metal, etc.
