Distinguish between a physical change and a chemical change?

Answer 1

One distinguishing feature between physical and chemical changes is that a physical change can be reverse or turn back to its original form, but chemical change cannot be return to its form because the material change.

Answer 2

A physical change is a change that simply breaks the intermolecular bonds of a substance (such as the breaking of hydrogen bonds in water when it is boiled - this is a physical change.) A chemical change, however, is when intramolecular forces are broken - bonds that occur between the atoms of the molecule. Chemical changes usually need more energy to take place, as intramolecular bonds are usually stronger than intermolecular bonds.

Answer 3

This is completely relative, depending on the level of sight you are watching. When it comes down to it, all chemical reactions are physical changes, because matter is becoming realigned in some way.

For the purposes of general chemistry, a chemical change would be when you drop some sugar (glucose for instance) into some water and the H20 tears it apart and begins attaching itself to the atoms.

A physical change is the albumin (egg white) when you boil or fry an egg. While cooking the egg, the protein (albumin) turns from a clear snotty like substance to a white delectable healthy snack.