Chemical and Physical Changes

Flashcards covering key vocabulary and concepts related to physical and chemical changes and related reactions.

Matter

Anything with mass and volume.

Physical Change

A change that does not alter the identity of a substance but can change its properties.

Chemical Change

Results in a rearrangement of atoms, changing the identity of the substance; a chemical reaction has occurred.

Sign of a Chemical Change

Production of an odor

Sign of a Chemical Change

Change in Temperature (release or absorb heat)

Sign of a Chemical Change

Change in Color

Sign of a Chemical Change

Production of Gas (bubbles, fizzing, or foaming)

Sign of a Chemical Change

Formation of a Solid (precipitate)

Combination Reaction

X + Y -> XY

Decomposition Reaction

XY -> X + Y

Single Replacement Reaction

A + BC -> B + AC

Double Replacement Reaction

AB + CD -> AD + BC

Combustion Reaction

Hydrocarbon + O2 -> CO2 + H2O

Precipitate

An insoluble solid that emerges from a liquid solution.