It's a physical change.
It's a chemical change. The concrete hardens through a chemical reaction called hydration :)
Its a physical change. The Chemical change already happened when the water was added. The concrete powder became hydrated turning it into usable concrete.
yes it is. It wouldn't be a chemical change because no new substance is form so, it's a physical.
Concrete hardening is an example of a chemical change. When water is added to the cement mixture, a chemical reaction occurs between the water and the cement particles, resulting in a new substance with different properties than the original components.
Yes, it is. This is because there is a physical change. Being a liquid forming a solid. There is a chemical reaction when the hot water is added to the powder, forming a liquid, which is cooled, forming a solid
it is a chemical change
Crushing charcoal into powder is a physical change, as it alters the size and shape of the charcoal without changing its chemical composition.
It would be both. It's a physical change because it is changing state and a chemical change because water is being evaporated.
It is a physical change.
It is a physical change.
yes it is. It wouldn't be a chemical change because no new substance is form so, it's a physical.
The reaction between water and concrete is a chemical change because new substances are formed as a result of the mixing process. In this case, the components of the concrete react with the water to form a new compound that hardens into a solid material through a chemical reaction.
Concrete hardening is an example of a chemical change. When water is added to the cement mixture, a chemical reaction occurs between the water and the cement particles, resulting in a new substance with different properties than the original components.
Yes, it is. This is because there is a physical change. Being a liquid forming a solid. There is a chemical reaction when the hot water is added to the powder, forming a liquid, which is cooled, forming a solid
This is a chemical process: a hydration reaction occur.
A physical change
Physical change of the paint, not the door.
it is a chemical change
An acid is a chemical compound, not a physical or chemical change.