Unit 1 matter phase change intro to equations

Molecule

Just atoms stack together.

Compound

elements that are chemically combined.

Mixture

Physically combined.

BrINClHOF: Diatomic Molecules

Bromine (Br), Iodine (I), Nitrogen (N), Chlorine (Cl), Hydrogen (H), Oxygen (O), Fluorine (F).

Diatomic Molecules

Molecules with 2 of the same atom.

Phase Change

Solid, Sublimation, Deposition, Melting, Freezing, Boiling.

Q=mcΔT

Formula for calculating heat transfer.

Melting Point

Temperature at which a solid becomes a liquid.

Boiling Point

Temperature at which a liquid becomes a gas.

Homogeneous Matter

Can't see parts; easily distributed.

Heterogenous Mixture

See the parts and can remove them.

Pure Substance

Matter in which all samples have identical properties & composition.

Energy Flow

Energy can be absorbed or released during reactions.

Physical Change

Changes in size, shape, or form without creating a new substance. Can be undone

Chemical Change

Particles of one or more substances are rearranged to create a new substance.

Endothermic Reaction

Absorbs heat energy from the environment, causing it to be cold.

Exothermic Reaction

Releases energy/heat, causing the environment to be hot.

Matter

Anything that has mass and takes up space.

Homogeneous

A substance of uniform composition, such as an element or a compound.

Heterogeneous Mixture

A mixture containing two or more types of matter, not of uniform composition.

Solution

A homogeneous mixture, such as salt in water.

Distillation

Separating salt and water.

Element

The same even if combined it would just be diatomic. However, the compound is different elements

Q = mHf (heat of fusion)

THE PLATEAU the formula used to calculate the heat energy required to change a substance from solid to liquid at its melting point.

Q = mHv (heat of vaporization)

THE PLATEAUS, determine the amount of heat needed to boil or condense a solid into a liquid during the phase change at the substance's boiling point.

Carbon & boiling points

The more carbon atoms in a molecule the higher the boiling point

Fractional Distillation

process used to separate a liquid mixture into individual parts, or fractions, based on differences in their boiling points.