chemical properties & physical and chemical changes
DESCRIPTION
Chemical Properties & Physical and Chemical Changes. Physical changes are those changes that do not result in the production of a new substance. If you melt a block of ice, you still have H 2 O at the end of the change. . - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/1.jpg)
Chemical Properties & Physical and
Chemical Changes
![Page 2: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/2.jpg)
Physical changes are those changes that do not result in the
production of a new substance. If you melt a block of ice, you still
have H2O at the end of the change.
![Page 3: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/3.jpg)
If you break a bottle, you still have glass. Painting your nails will not stop them from being fingernails. Some common
examples of physical changes are: melting, freezing,
condensing, breaking, crushing, cutting, and bending.
![Page 4: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/4.jpg)
Some, but not all physical changes can be reversed. You could
refreeze the water into ice, but you cannot put your hair back together
if you don’t like your haircut!
![Page 5: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/5.jpg)
Special types of physical changes where any object changes state, such as when water freezes or
evaporates, are sometimes called change of state operations.
![Page 6: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/6.jpg)
CHEMICAL PROPERTIESChemical properties can ONLY be observed AS the substances are changing into different substances.
![Page 7: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/7.jpg)
Chemical changes, or chemical reactions, are changes that result
in the production of another substance.
![Page 8: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/8.jpg)
FLAMMABILITY: A material’s ability to BURN in the presence of OXYGEN
![Page 9: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/9.jpg)
REACTIVITY:How readily (easily) a substance combines chemically with other
substances.
![Page 10: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/10.jpg)
Which has higher reactivity? A 14 karat gold ring or a cheap metal ring from the vending machine at the grocery store?
What is your evidence?
![Page 11: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/11.jpg)
When you burn a log in a fireplace, you are carrying out a chemical reaction that releases carbon. When you light your Bunsen burner in lab, you are
carrying out a chemical reaction that produces water and carbon
dioxide.
![Page 12: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/12.jpg)
Common examples of chemical changes that you may be
somewhat familiar with are; digestion, respiration,
photosynthesis, burning, and decomposition.
![Page 13: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/13.jpg)
Physical or Chemical Change?
•Painting Wood•PHYSICAL
![Page 14: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/14.jpg)
Physical or Chemical Change?
•Burning Paper•CHEMICAL
![Page 15: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/15.jpg)
Physical or Chemical Change?
•Digestion of food•CHEMICAL
![Page 16: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/16.jpg)
Physical or Chemical Change?
•Sugar dissolving in water
•PHYSICAL
![Page 17: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/17.jpg)
Physical or Chemical Change?
•Iron turning red when heated
•PHYSICAL
![Page 18: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/18.jpg)
Physical or Chemical Change?
•Evaporation•PHYSICAL
![Page 19: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/19.jpg)
Physical or Chemical Change?
•A pond freezing in winter
•PHYSICAL
![Page 20: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/20.jpg)
Physical or Chemical Change?
•Melting ice•PHYSICAL
![Page 21: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/21.jpg)
Physical or Chemical Change?
•Cutting wire•PHYSICAL
![Page 22: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/22.jpg)
Physical or Chemical Change?
•Painting fingernails•PHYSICAL
![Page 23: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/23.jpg)
Physical or Chemical Change?
•Cutting fabric•PHYSICAL
![Page 24: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/24.jpg)
Physical or Chemical Change?
•Baking muffins•CHEMICAL
![Page 25: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/25.jpg)
Physical or Chemical Change?
•Shattering glass•PHYSICAL
![Page 26: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/26.jpg)
Physical or Chemical Change?
•Decomposition of old leaves
•CHEMICAL
![Page 27: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/27.jpg)
Physical or Chemical Change?
•Wrinkling a shirt•PHYSICAL
![Page 28: Chemical Properties & Physical and Chemical Changes](https://reader036.vdocuments.net/reader036/viewer/2022062410/56816348550346895dd3d77f/html5/thumbnails/28.jpg)
Physical or Chemical Change?
•An old nail rusting•CHEMICAL