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You know if it's a chemical chagewhen two or more of the following have happened:
1. a precipitate has formed(bubbles)
2. heat is absorbed or released
3. there is a change in odor
4. there is a change in colour
5. the change is diffiult to reverse
6. starting material is used up
7. a material with new properties is formed
A physical change may only be a change in state and the change should be easy to reverse
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoA physical change is when the object changes shape, color, or physical state.
Wiki User
∙ 11y agoThe physical and chemical properties, and chemical composition, are not changed after a physical change.
Wiki User
∙ 13y agoThe process can be easily reversed by evaporating the water.
Wiki User
∙ 12y agoa physical change is when there are no new substances made and it is easy to reverse, a chemical change is when there is a new substance made and it is not easy to reverse
Wiki User
∙ 7y agoBoiling and melting are examples of physical changes because when you boil water, it's still water. When you melt chocolate, it's still chocolate. Therefore they have not chemically changed.
Wiki User
∙ 10y agotoast
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Can you show you more examples of physical and chemical change?
Physical changes: melting, boiling, cutting, griding, condensation, rolling, etc.Chemical changes: burning, cooking, frying, bleaching, thermally decomposition, fermentation, etc.
What are the physical changes to gold?
The physical changes to gold can be its colour, lustre, melting point, boiling point, freezing point, ductility, etc
What are Examples of objects that undergo physical change?
Ice melting, water boiling and cutting paper. It usually has to do with changing the shape or state of the matter.
Is boiling gold a physical change?
Melting of gold for jewellery making is a physical change as no new substance is formed after melting. Changes in state or phase are physical changes.
Differences between physical changes and chemical changes?
Physical changes are reversible changes, such as change of state (boiling, melting etc), chemical changes are when something undergoes a reaction changing it's chemical makeup.
Does melting and boiling cause physical changes?
Melting and boiling are physical changes.
What are some physical changes of nickel?
Examples: melting, boiling, mechanical processing.
What is boiling point and melting point examples of?
Physical Changes...Hope this helped...Your Very Much Welcome!! ;P
Physical change when mattter are formed?
Physical changes are melting, boiling, sublimation.
Is melting of ice a physical process?
Yes, changes of state (melting, boiling, freezing, condensing) are physical processes.
What ar some examples of physical changes of matter?
Ice melting, water boiling and cutting paper. It usually has to do with changing the shape or state of the matter.
Can you show you more examples of physical and chemical change?
Physical changes: melting, boiling, cutting, griding, condensation, rolling, etc.Chemical changes: burning, cooking, frying, bleaching, thermally decomposition, fermentation, etc.
Color odor boiling points melting points are all examples of what properties physical or chemical?
Physical
How can you tell that melting boiling dissolving are physical changes?
The physical and chemical properties, and chemical composition, are not changed after a physical change.
What are the physical changes to gold?
The physical changes to gold can be its colour, lustre, melting point, boiling point, freezing point, ductility, etc
What are Examples of objects that undergo physical change?
Ice melting, water boiling and cutting paper. It usually has to do with changing the shape or state of the matter.
What is the differences between physical and chemical changes in relation to fire services?
Physical changes are melting and boiling in this case; fire is a combustion, a chemical change.
