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If you burn something it is a chemical change, however if you melt of boil it, it is a physical change.
chemical properties
When a physical change occurs, the compound stays the same. For example, if you boil water, the chemical formula still remains H2O and is a physical change. However, if you were to change the chemical formula, it would be a chemical change. If H2O were split into H2 and O2 gas, it would be a chemical change.
The increase of pressure of a given gas is usually a result of a change in the temperature of the gas. An increase in temperature creates a corresponding increase in pressure.
Unless you overdo it and carmelize it, it is a physical change. A typical process is to dissolve a large amount of sugar into hot water (physical change - the sugar is still sugar and the water is still water; they do not react. If the sugar-water is not syrupy enough, you can boil off some of the water (still a physical change). If you overdo it though, you will begin to caramelize the sugar. If the sugar is sucrose, it breaks down into fructose and sucrose along with a host of other side reactions that condense, isomerize, dehydrate, fragment, polymerize, and otherwise chemically change the original sugar. Caramelization is definitely a chemical change, but it is not necessary to make syrup.
it's a physical change!
it's a physical change!
If you burn something it is a chemical change, however if you melt of boil it, it is a physical change.
Its A physical change. When you boil water under a stove, The water evaporates and the chemical stays in the..pan or whatever you put in it.
Its A physical change. When you boil water under a stove, The water evaporates and the chemical stays in the..pan or whatever you put in it.
chemical properties
Nope - it's a physical change. The chemical composition is still H2O
It is a physical change, known as a phase transition (see related links below).There is no chemical change: the water molecules remain water molecules. They have simply acquired enough kinetic energy to escape the attraction of the molecules in the liquid and move (almost) freely.
It is a chemical change, the iron is being oxidized and forming rust. A good way to think about it is if you can undo it then it is a physical change. For example if you put salt in water, that is a physical change because you can boil off the water and get the salt back. Source: AP Chemistry
No because water condense on the side of a cold glass and then evaporate again. Further answer Really, if a gas becomes a liquid it's a physical change because the gas has changed its phase from gas to liquid. It's not related to water particularly.
Physical Separationreversible - can be separated by physical means - E.g shaking a bottle of Greek salad dressing, the different ingredients mix but don't form a new substance.Chemical Separationirreversible - can be separated by chemical means - E.g burning of wood or coal
When a physical change occurs, the compound stays the same. For example, if you boil water, the chemical formula still remains H2O and is a physical change. However, if you were to change the chemical formula, it would be a chemical change. If H2O were split into H2 and O2 gas, it would be a chemical change.