Chemical:
Chemistry is a natural discipline that studies the composition, structure, nature and changing laws of matter.
Change {Physical Change}
Changes that
do not produce other substances are called physical changes.
such as: Gasoline volatilization, molten iron pot, candles heated melting
{Chemical Change}
There are other substances that produce changes called chemical changes, also called chemical reactions.
such as: firewood burning, iron rust
{The relationship between physical changes and chemical changes}
In the process of chemical change of matter, physical changes occur
at the same time .
Such as: light candles, paraffin wax heated melting is a physical change, and paraffin burning produces water and carbon dioxide, but is a chemical change.
{Chemical Properties}
The nature of the substance that we exhibit in the chemical change is called chemical property.
For example, copper produces patina in moist air.
Physical properties
Substances that do not require chemical changes are called physical properties.
such as: The color, state, odor, hardness, melting point, boiling point, density of the material
Note: It is necessary to specify the condition when describing the nature of the substance.
The atmospheric pressure is fixed, and the 101KPA is regulated by the standard atmospheric pressure.
Physical changes, chemical changes, physical properties, chemical properties
