Chemical vs. Physical. Properties and Changes. What is the difference between a chemical and a physical property? A physical property can be measured or observed using the 5 senses, but a chemical property is the way a substance reacts with other substances to form an all new substance. .
Properties and Changes
A physical property can be measured or observed using the 5 senses, but a chemical property is the way a substance reacts with other substances to form an all new substance.
Two types of changes:
Chemical and Physical
Only physical properties are changed.
It is still the same substance.
For example: If I paint a volleyball blue…it is still a volleyball. Only the physical property of color has changed.
Chemical properties are changed along with physical properties.
This results in the creation of a NEW substance with all new properties.
You cannot easily get back the original substance.
For example: Spoiled milk… no longer milk!!!
There are several clues that a chemical change is occurring or has occurred:
Temperature change (exo or endothermic)
Smoke or flame produced
Production of gasses
New substance is created
2. Making a peanut, pretzel and cereal mixture.
3. Baking soda reacts with vinegar and forms a gas.
4. A piece of metal is bent in half.
5. An aspirin is crushed into fine powder.
6. Copper turns green when exposed to the environment.
7. Two clear liquids are mixed and a yellow color forms.
8. Baking cookies.
9. Diamonds are used to scratch glass.
10. A tree burns to form ashes.
11. A piece of paper is crumpled up.
12. Water freezes to form ice.
13. Food rotting.
14. A candle burning.
15. A candle melting.Identify each of the following as either a Physical change (P) or a chemical change (C)