Vocabulary Set 4 Flashcard

Absolute Zero
The point where no more heat can be removed from a system. According to the absolute or thermodynamic temperature scale.
Boiling Point
The temperature at which a liquid boils & turns to vapor.
Conduction
The process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.
Convection
The movement caused within a fluid by the tendency of hotter & therefore less dense material to rise, & colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
Diffusion
Movement of a fluid from an area of higher concentration to an area of lower concentration. Is a result of the kinetic properties of particles of matter. The particles will mix until they are evenly distributed.
Effusion
The movement of a gas through a pore or capillary into another gaseous region or into a vacuum.
Endothermic
(Of a reaction or process) accompanied by or requiring the absorption of heat.
Entropy
The measure of the disorder of a system, usually denoted by the letter S. A high ordered system has low entropy.
Exothermic
(Of a reaction or process) accompanied by the release of heat.
Gas
A state of matter consisting of particles that have neither a defined volume nor defined shape.
Kinetic Energy
The energy an object possesses due to its motion. An object of mass m moving at velocity v has a kinetic energy equal 1/2mv2.
Liquid
Is one of the states of matter. The particles in a liquid are free to flow, so while a liquid has a definite volume, it does not have a definite shape.
Melting Point
The temperature at which a given solid will melt.
Plasma
An ionized gas consisting of positive ions & free electrons in proportions resulting in more or less no overall electric charge, typically at low pressures (as in the upper atmosphere & in fluorescent lamps) or at very high temperatures (as in stars & nuclear fusion reactors).
Solid
A state of matter characterized by particles arranged such that their shape & volume are relatively stable. The constituents of a solid tend to be packed together much closer than the particles in a gas or liquid.
Vacuum
An absence of air or other gas.
Vapor Pressure
The pressure exerted by a vapor in equilibrium with the solid or liquid phase of the same substance. Also, the partial pressure of the substance in the atmosphere above the solid or the liquid.

Get instant access to
all materials

Become a Member