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PHYSICAL AND CHEMICAL CHANGES (CHEMICAL CHANGE (. (IDENTYFYING CHEMICAL…
PHYSICAL AND CHEMICAL CHANGES
PHYSICAL CHANGES
There are three physical changes
VAPORIZATION
This method is used to separate solutions of solids in a liquid solvent. After heating the mixture, the liquid is vaporized.
The solid deposited at the bottom of the container is then recovered.
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DISTILLATION
This method allows solutions of liquids with diferent boiling points to be separated.
The mixture is heated until the liquid with a lower boiling points evaporated.
The gas is collected and colled and it is condensed in another container
CHROMATOGRAPHY
This technique allows the components to be separated according to the speed at which they travel through an absorbent surface such as a piece of paper.
CHEMICAL CHANGE
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A chemical change occurs when one or more than one pure substance turn into different pure substance.
IDENTYFYING CHEMICAL CHANGES
Examples:
When a original substance change his smell.
When the temperature of the substance change.
When the color changes in an original substance.
A Chemical change is recover to the original substance.
Chemical changes are harder to go back in it principal position than the physical ones.
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**ALEIX VILARÓ - GABRIEL CELEDON -
ÈLIA MARIN - HOSSAM BOUTIARZIST
GRUP 10
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