Physical and Chemical Changes & Law of Conservation of Mass

32 terms by kathylee123

Create a new folder

Advertisement Upgrade to remove ads

Physical and Chemical Changes & Law of Conservation of Mass

Boiling point

the temperature at which a liquid changes to a gas at a given pressure

Chemical change

a typically irreversible chemical reaction involving the rearrangement of the atoms of one or more substances resulting in a change in their chemical properties or composition and resulting in the formation of at least one new substance

Chemical formula

chemical symbols that indicate the number of atoms of each of the elements found in a compound

Chemical reaction

a process in which atoms of the same or different elements rearrange themselves to form a new substance - some clues that one is taking place or has taken place may include bubbles, smoke, a strong smell, color change, temperature change, or a sizzling sound

Closed system

a physical system that is not open and does not interact with other systems it cannot exchange matter or energy with its surroundings

Coefficient

a number used to multiply a variable

Ductile

the ability to be stretched into a thin wire

Endothermic

a chemical reaction in which heat energy is absorbed

Exothermic

a chemical reaction in which heat energy is given off

Freezing point

the temperature at which a liquid changes to a solid at a given pressure

Gas

the state of matter that is not a solid or liquid; characterized by low density, the ability to expand and contract with changes in pressure and temperature, and the ability to diffuse

Law of conservation of mass

a law that states that during a chemical reaction matter cannot be created or destroyed it just changes form

Liquid

the state of matter that is not a solid or gas; characterized by particles that flow free, a definite volume, and not a definite shape

Luster

the way light is reflected from the surface of a mineral

Malleable

the ability to be hammered into a sheet

Mass

amount of matter contained in a substance

Melting point

the temperature at which a solid becomes a liquid at a given pressure

Odor

the property of a substance that stimulates the sense of smell

Open system

a physical system that is open and does interact with other systems - it does exchange matter or energy with its surroundings

Physical change

any process involving a substance's change from one state (gas, liquid, solid) to another without alteration of the chemical composition

Physical properties

any property used to characterize matter and energy and their interactions

Polarity

tendency of a molecule, or compound, to be attracted or repelled by electrical charges because of an unequal arrangement of atoms around the nucleus

Precipitate

an insoluble substance that is produced as result of a chemical reaction

Product

a substance that is formed as a result of a chemical reaction

Reactant

the substances that are present before a chemical reaction occurs - they are altered during the chemical reaction and create new products

Solid

the state of matter that is not a liquid or gas; characterized by a physical state that resists changes in size and shape

Solubility

the ability of a substance to dissolve in another substance

Specific heat

the amount of energy needed to raise one gram of a substance by one degree Celsius

States of matter

one of the three traditional principal conditions in which matter exist - solid, liquid, and gas

Subscript

in a chemical formula, the number written next to the right and slightly below a letter or number - it indicates the number of atoms of the element that are in the molecule

Texture

the appearance and feel of a surface

Volume

the amount of space that an object or substance occupies

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set