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What else can I help you with?
What is an example of a physical change that can be reversed?
A reversible change is when something can turn back into its original shape for example when ice is melted it turns into a liquid but then you can freeze it into a solid again do the change is reversible because it can change back into its original starter which is the ice in this case. But if you make a cake it is not reversible because all of the mixture has mixed together and it turns into one object this is called a chemical change. Also a reversible change is a physical change! Hope this helped ;)
Is it true that a physical change and a chemical are exactly alike?
Not true, they are not similar; a chemical change is a change in the molecule, the physical change is not.
Is melting of wax reversible or irreversible change?
Yeah, definitely. Just wait.
Is the melting of ice is a chemical or physical change why?
Melting ice is a physical change because the properties of the physical changes say that there is a physical change when the state of a material changes. the ice changes into water after melting .this is temporary change as the property says. you can change water back into ice by freezing.
Is dissolving salt into water a reversible change?
it's acutely reversible
Is physical reaction the same as physical change?
a physical reaction is non-reversible e.g. when you bake a cake or fry an egg. a physical reaction is reversible e.g. when you melt ice or chocolate. i did this in chemistry today, ^-^ (but did you mean a chemical reaction?)
What is an example of a physical change that can be reversed?
A reversible change is when something can turn back into its original shape for example when ice is melted it turns into a liquid but then you can freeze it into a solid again do the change is reversible because it can change back into its original starter which is the ice in this case. But if you make a cake it is not reversible because all of the mixture has mixed together and it turns into one object this is called a chemical change. Also a reversible change is a physical change! Hope this helped ;)
Is it correct to say the chemical changes are not reversible but physical changes are?
yes it is correct because chemical energy means you can't change something back like paper if you burned that paper you can't change it back but if you had that paper and you ripped it you can glue it back you can fix it that is physical energy when you can put something back together so yes you can say that.
What is an example of a physical change that can't be reversed?
Lets say I slapped you in the face. Your face would be red (possibly bleeding if I use my slapping gloves) and that would not be reversible (at least for the moment)
A popsicle melting is physical or chemical change?
Melting is a physical change.
Is removing nail polish chemical or physical change?
This is probably an example of the sort of ambiguity which is the reason 'physical' and 'chemical' changes tend not to be mentioned outside of early science education. The exact physical make-up of the solute (nail polish) is not changed, but chemical bonds are both broken and made in this process (various intermolecular bonds). The reaction is reversible, but then, all chemical reactions are reversible, but require extra energy put into the system to reduce the entropy. Probably the best approximation would be to say it is a physical change, since all/most of the molecules involved are structurally unchanged.
Why do you say that physical change has occurred?
WEA
Is it wrong to say a chemical change is irreversible while physical change is reversible?
Simplistically speaking, the statement is true - not wrong/false. For example, one physical change is to fold paper. After the paper is folded, you can rather effectively unfold it and return it to its original condition. One chemical change is to burn something. After paper is burned, the ashes cannot be "unbunrt" back into paper. However, some chemical changes are reversible. For example, photosynthesis is a chemical change in which water, carbon dioxide, and energy are turned into oxygen and sugars. Respiration is a chemical process in which oxygen and sugars are converted back into water, carbon dioxide, and energy. However, the process of respiration is much more complex than photosynthesis and is not the "reverse" of it, i.e. respiration is non un-photosynthesis.
What kind of change happens when a substance dissolves?
I want to say physical change
Is an egg turned into an omlette a physical or chemical change?
at a guess, my sister and i say physical
Is it true that a physical change and a chemical are exactly alike?
Not true, they are not similar; a chemical change is a change in the molecule, the physical change is not.
A physical change differs from a chemical change in that waste products are formed through chemical changes?
Not necessarily. This only happens in decomposition reactions, where energy reacts to break apart a compound. In, say, a synthesis reaction, sodium and chlorine combine, but don't leave a waste product. A physical change differs from a chemical change in that the product is the same substance, while in a chemical change it forms a/some different substance. Think about ripping a sheet of paper-is it still paper? If you burn the sheet of paper-is it still paper
