If a solid is crushed to a powder, it is a 'Physical' change.
This is because the chemical compounds in the solid isn't changing, just the texture and shape of it.
Physical, if it became an entirely new substance it would be chemical
C
hemcal change
Chemical I think
Powdery is an adjective which not require any change!You can have a physical change where a large lump of some substance is ground into powder. Or you can have a chemical change (eg magnesium burning) which leaves a powdery residue.
Dehydration of hydrated salts is usually considered to be a physical change.
If you are talking about adding a pack of powder to some liquid then this is a physical change. The powder is being dissolved in the liquid and therefore undergoing a change of state, this is however reversible by evaporating the liquid of to leave you with a solid mass (the original powder just not broken up)
Chemical, since it is no longer gun powder after the reaction, it is smoke.
Chemical I think
A "chemical" change takes place when an acid dissolves soft rock. A "physical change" occurs when a rock is crushed into powder.
Hi
Mixing lemonade powder into water is a chemical change. This is because the powder changes the water molecules and can not be taken out.
The thermal decomposition of baking powder is a chemical change.
The thermal decomposition of baking powder is a chemical change.
physical change
After a piece of chalk is pounded by a fist or rolling pin or other object it normally get crushed and turns into lumpy powder.
This is a physical process.
1. Any chemical reactions - a physical phenomenon.2. Mixing when chemical reactions are implicated - chemical change (depending on the type of the liquid and powder).
No it is physical
It is a chemical change.