Ice cream from a solid to a liquid is melting, while from a liquid to a solid is freezing. Both of these are physical changes.
When a physical change takes place, a certain element or chemical will change its shape and in many cases, the volume too. Water takes the shape of the mold casing once it freezes.
The melting of the wax is a physical change. The burning the of wick is the chemical change
The chemical nature/identity of the substance stays the same when a physical change takes place.
No, in a physical change, no new substances are formed. The change only affects the physical appearance or state of the matter, such as size, shape, or phase, but the chemical composition remains the same.
The change that takes place when sugar is heated to form a thick, colorless liquid substance is a physical change. This is because the molecular structure of the sugar remains the same even though its physical state has changed from solid to liquid.
No. It is purely a physical change, that of melting. No chemical reaction takes place.
I assume you mean chemical "change" and the answer is no, it is a physical change that takes place.
Physical
When a physical change takes place, a certain element or chemical will change its shape and in many cases, the volume too. Water takes the shape of the mold casing once it freezes.
The melting of the wax is a physical change. The burning the of wick is the chemical change
Sawdust is part of a physical change that takes place when wood is sawed.
physical and irreversible
The chemical nature/identity of the substance stays the same when a physical change takes place.
A chemical change occurs when a new species is formed, and is generally not reversible. A physical change can usually be reversed as in the case of instant coffee. The coffee goes from a solid to a solution. Evaporation of the water would give the coffee back as a solid.
A phase change.
No, in a physical change, no new substances are formed. The change only affects the physical appearance or state of the matter, such as size, shape, or phase, but the chemical composition remains the same.
The change that takes place when sugar is heated to form a thick, colorless liquid substance is a physical change. This is because the molecular structure of the sugar remains the same even though its physical state has changed from solid to liquid.