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physical changes are sometimes reversible

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Q: All the activities to show that physical changes are usually reversible?
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Related questions

what is the difference between chemical change and physical changes?

the difference between a physical change and a chemical change is that a physical change is usually reversible whilst a chemical change is not reversible.


What Is the difference between physical changes and chemical change?

the difference between a physical change and a chemical change is that a physical change is usually reversible whilst a chemical change is not reversible.


What are reversibile reactions?

Reversible reactions usually involve a reaction that changes the physical state of the substance, not the chemical properties


Why liquid water changing into steam is a physical not a chemical change?

The steam when cooled changes back to liquid water. A chemical change is usually not so reversible.


What is the difference between chemical change and physical change?

the difference between a physical change and a chemical change is that a physical change is usually reversible whilst a chemical change is not reversible.


Is petrol burning in an engine is it a physical changes?

No,it's a chemical change,because the petrol used can't reversible,also.A considerable amount of heat change is usually involved.


Are chemical changes irreversible If yes then what about the chemical reactions that are reversible Don't we say that all chemical reactions are chemical changes?

some chemical changes can be reversed but they are hard to reverse usually


How can you force a physical change in matter?

Physical, or state changes are usually accomplished with heating or cooling


Is melting ice a chemical or physical change explain?

It is a physical change because when you have a chemical change it changes the properties and makes it into a new thing, and it can't be reversed. Physical changes are usually just changes of states (solid, liquid, gas) and a physical change can be reversed.


Compare the total energy before and after physical and chemical changes?

Physical changes are usually reversible and chemical changes you can't usually reverse them. Frying an egg is chemical because you can't get the raw egg back. Freezing water would be physical... hope this helps! ----------- Chemical change is a change that imply modifications in the structures of molecules; new compounds appear. Ex.: burning of coal with releasing of carbon dioxide and water. Physical changes don't imply the structure modification of the molecules but only the state of matter, form, dimensions; the chemical compound remain unchanged. Ex.: grinding of coal to be used in a thermal power unit.


What is the difference between a chemical change and physical change?

A physical change changes the physical properties of an element like color where chemical changes change the chemical properties of an element and usually can't be undone.


What is the difference between a chemical reaction and physical change?

The difference between them is that in a chemical reaction, the chemical make up of the substance put into the experiment is changed or modified. In a physical change, only the physical attributes of the substance is changed, like size, shape, color, density, etc.