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Yes, at least one physical change can be undone: ice can be melted into water, then frozen again into ice.
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∙ 13y ago
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Is dissolving salt in water a a chemical change or a physical change?
It is a physical change as it can be "undone" by evaporating the water. An simple example of a chemical change is baking a cake, you can't un-bake a cake. To work out whether it is a chemical or physical change just think whether it can be undone or not.
Is frezzing water a chemical change or physical change?
Freezing water is a physical change. It can be undone. In all situations, ask yourself if the substance can be undone. If the substance can be undone then it is undergoing a physical change. Freezing the water is only changing its phase, therefore it is only experiencing a physical change.
When a cube of ice melts to form a puddle of water is it a physical change?
Yes. No chemical change has taken place, only a physical change. It can be undone (liquid water can be re-frozen)
Is frying a chicken physical or chemical change?
Physical changes can be undone. It is not possible to unfry a chicken. The heat casues chemical changes in the meat and in any coating.
Is alcohol evaporates physical or chemical changes?
Evaporation is a physical change- it is still alcohol. The change can be undone by colling the air and condensing the ethyl alcohol vapor back to liquid alcohol.
Is panning a chemical change or physical change?
Panning (for gold) is neither of the above.
Is dissolving salt in water a a chemical change or a physical change?
It is a physical change as it can be "undone" by evaporating the water. An simple example of a chemical change is baking a cake, you can't un-bake a cake. To work out whether it is a chemical or physical change just think whether it can be undone or not.
Is frezzing water a chemical change or physical change?
Freezing water is a physical change. It can be undone. In all situations, ask yourself if the substance can be undone. If the substance can be undone then it is undergoing a physical change. Freezing the water is only changing its phase, therefore it is only experiencing a physical change.
Dissolving sugar in lemon water is physical or chemical?
Physical change- it can be undone by evaporating the water.
Baking a cake is physical change or chemical change?
Chemical change. Physical changes (like melting) can be undone. But you cannot unbake a cake.
What is a piece of paper is set on fire is this chemical or physical change?
A chemical change. Physical changes can be undone. You cannot unburn paper.
Is carving wax a chemical or physical change?
Physical change. It is still wax, and can be uncarved by being melted and recast. Chemical changes cannot be undone without applying energy.
Exameple of a physical change and a chemical change?
A physical change is a change that can be undone. A chemical change cannot be undone. An example of this would be dissolving salt in water. This is a physical change because if you let the water in the container evaporate the salt will be left behind. A chemical change would be like burning a piece of wood since you cannot undo the change taking place to the wood.
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.
Is alcohol evaporating a chemical change or a physical change?
Is a physical change as the alcohol is changing states
Physical change copper chloride aluminum foil experiment?
It's a chemical change. The aluminum foil is rusting, which cannot be undone, meaning that this is a chemical change, not a physical. Physical changes can be reversed.
Is ethyl alcohol evaporates a physical or chemical change?
Is a physical change as the alcohol is changing states
