Chemistry midterm terms and definition

Pure substance

uniform substances with unchanging composition (gold, hydrogen)

Compound

pure substance made of two or more atoms of different elements joined by chemical bonds (water, salt, carbon dioxide)

Element

pure substance that cant be broken down, made of 1 type of atom

mixture 

combination of tow or more chemical substances while retaining its respective individual chemical properties. can be homogenous or heterogenous (blood, sucrose, dirt, )

Extensive property

properties which depend on the AMOUNT of substance present (mass, length, volume)

Intensive property

properties which do NOT depend on the amount of substance present (color, ordor hardness, density)

Sublimation

Solid to Gas

Deposition

Gas to Solid

Supercritical substance  

substance existing at a temperature and pressure above its critical point, where distinct liquid and gas phases cease to exist, creating a single, fluid phase with properties of both

Triple point

the temperature and pressure conditions at which the solid, liquid and vapor of the substance can coexist at equilibrium

Critical point

shows the temperature and pressure where a substance can no longer exist as a liquid

kinetic molecular theory

The theory that all matter is made up of particles and that those particles are constantly moving

gas pressure

the force that a gas exerts as its particles collide with the walls of its container or with other surfaces

Specific Heat Capacity

The more heat an object gains, the hotter it gets.

King Henry doesn’t usually drink chocolate milk

short hand term for Si measurments