Does freezing a substance change it?
Freezing is a physical change. It involves a liquid changing states to a solid.
Thus, freezing a substance will not change its chemical identity, but its state.
Freezing a substance is definitely a physical change, but the act of freezing it can have varied results depending on the substance and the temperature.
For example, when liquid water reaches about
If you are freezing a substance that is already a solid, it will usually become more brittle as the temperature is reduced, and so will break easier. Consider an orange, or a length of aluminum extrusion, that can be shattered easily after being dipped into liquid nitrogen.
As the temperature of a substance is further reduced, scientists have observed many strange and interesting physical changes taking place, particularly when the temperature is reduced to near absolute zero or