Lesson 6 Flashcards
They are transformations of matter from one physical state to another. They occur when energy (usually in the form of heat) is added to or removed from a substance.
Phase changes
The state of matter without a set shape or volume.
Gas
The transition of matter from one state to another.
Phase change
The change of the physical state of matter from gas to liquid. The opposite of evaporation.
Condensation
The state of matter with a set volume but no set shape.
Liquid
The amount of force per unit area.
Pressure
The change of the physical state of matter from solid directly to gas. The opposite of deposition.
Sublimation
The change of the physical state of matter from gas directly to solid. The opposite of sublimation.
Deposition
Anything that both occupies space and has mass.
Matter
The amount of space an object occupies.
Volume
Measure of increasing kinetic energy from solid to liquid to gas.
Temperature
The state of matter with a set volume and a set shape.
Solid
The change of the physical state of matter from a liquid to a gas. The opposite of condensation.
Evaporation
The amount of matter contained in an object.
Mass
Highly ionized (charged) gases that exist at high temperatures.
Plasma
The change of the physical state of matter from solid to liquid. The opposite of freezing.
Melting
The change of the physical state of matter from liquid to solid. The opposite of melting.
Freezing
These two scientific concepts are needed to enable these substances to undergo phase changes.
Temperature and pressure
Therefore, _______ and _______ are needed to liquefy gases.
High pressure and low temperature
It is the combination of pressure and temperature at which all three phases of matter are at equilibrium. It is the point on a phase diagram at which the three states of matter coexist.
Triple point
The merged single phase beyond the temperature of the critical point.
The temperature and pressure corresponding to this are known as the critical temperature and critical pressure.
Supercritical fluid
