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It doesn't matter if something is reversible or irreversible. it will not depend if it is a chemical or physical change. A physical change is when the composition of a substance remains unaltered (the particles stay the same) and no new substance is produced. Such as when you make a paper plane out of paper, the appearance changed, the particles stayed the same, no new substance was created, and the paper remains paper. A chemical change is when the composition of a substance is altered and a new substance is produced. Such as when paper is burned, the new substance produced is the carbon and other gases from the fire, and the composition of the paper changes, slowly disappearing.
It usually is unless you draw so rapidly that the heat of the friction heats the paper and causes it to smoke.
What else can I help you with?
Is breaking a glass beaker chemical or physical?
Breaking, grinding, cracking are all examples of a physical change. The nature of the substance has not changed, just the size of the pieces has changed.
Is a well cooked steak chemical or physical change?
Cooking involve many chemical processes but also some physical processes as evaporation or melting.
Is breaking a glass window with a baseball a chemical change or physical change?
Breaking, grinding, cracking are all examples of a physical change. The nature of the substance has not changed, just the size of the pieces has changed.
Is painting a door a physical or chemical change?
Physical change of the paint, not the door.
When sandpaper smooths a piece of wood what kind of change is it?
this is a physical change
What kind change is grinding chalk into powder?
Grinding chalk really doesn't change the chalk except to make it into powder. So that makes it a physical change. It is much like ice melting into water.
What is the kindof the change represented by grinding chalk into a powder?
A physical change.
Is pulverized chalk a physical or chemical change?
Grinding chalk to chalk dust is a physical change because the texture and size may change but the its molecules are still the same.An example of chemical change is burning paper because ash is chemically different from paper.
Is grinding chemical or physical change?
grinding is a physical change
Is crushing a piece of chalk a chemical change or a physical change?
Crushing a piece of chalk is only a physical change. Chemically, it is still chalk.
Grinding pepper a physical change?
yes grinding pepper is a phisical change
Is grinding of meat a physical or chemical?
no it is a physical change because you are just changing the size not the chemical structure
Is a piece of chalk crushed a physical change?
Yes, crushing a piece of chalk is a physical change because the chalk is still composed of the same molecules before and after being crushed. The change in appearance is only due to the physical state of the substance.
Why is breaking chalk a physical change?
Besides for rearranging the glass pieces, one is not actually changing the chemical formula of the glass. Much like grinding NaCl, the crystals get smaller but the chemical remains the same.
Is mixing chalk with water a physical change or chemical change?
physical :)
Is grinding sulfur a chemical or physical change?
Grinding sulfur is a physical change because the substance is still sulfur; only the form has changed from solid pieces to smaller particles. No new substances are formed during grinding.
Is grinding of meat is it a chemical or physical?
Physical change.
