chem test vocab Flashcards
(25 cards)
heat
The energy transferred between objects that are at different temperatures
temperature
average kinetic energy of all the atoms or molecules of that substance
phase change
when matter changes from one state to another
kinetic energy
a form of energy that an object or a particle has by reason of its motion
system
a quantity of matter or a region in space that is of interest
surroundings
The mass or region outside the system
endothermic
Absorbs heat/energy
exothermic
Releases heat/energy
thermal equilibrium
when substances approach the same temperature, and in the absence of loss to other objects, they will maintain a constant temperature
melting
solid to liquid (endothermic)
freezing
liquid to solid (exothermic)
Vaporization
liquid or solid to gas (endothermic)
boiling
liquid to gas (endothermic)
Evaporation
immediate change from a liquid to gas (endothermic)
Condensation
phase change from gas to liquid (exothermic)
sublimation
solid state to gas state without passing through the liquid state
energy
a part of a system of particles that is stored in the bonds of chemical compounds
deposition
gas to solid (exothermic)
thermal insulator
prevents heat from moving from one place to another
thermal conductor
Allows the transfer of heat energy through the material
conduction
the process in which heat energy is transmitted through neighboring atoms or molecules
Convection
The transfer of heat by the movement of a fluid
Radiation
The transfer of energy by electromagnetic waves
vaporization or condensation
Q = m∆Hvap
