Thermochemistry Flashcards
capacity to do work
energy
chemistry defined - as directed energy change resulting in process
work
energy that comes from the sun and is earth’s primary energy source
radiant energy or solar energy
energy associated with the random motion of atoms and molecules
thermal energy
energy stored within structural units of chemical substances
chemical energy
energy available by virtue of an objects position
potential energy
the transfer of thermal energy between 2 bodies that are at different temperatures
heat
the study of heat change in chemical reactions
thermochemistry
the specific part of the universe that is of interest to us
system
the rest of the universe outside a system
surrounding
can exchange mass and energy, usully in the form of heat with its surroundings
open system
allows the transfer of energy (heat) but not mass
closed system
does not allow the transfer of either mass of energy
isolated system
properties that are determined by the state of the system, regardless of how that condition was achieved; only the start and end points matter rather than the path taken
state functions
the first law of thermodynamics
energy can be converted from one form to another but cannot be created or destroyed
