chapter 6 Flashcards
state function
property that does not depend on that system’s past or future
path function
property that depends on past/future or path taken to arrive at the current state
energy
the capacity to do work
what kind of function is energy
state function
potential energy
energy a molecule has stored up in its bonds
energy is released when…
chemical bonds are formed and consumed when chemical bonds are broken
kinetic energy
energy due to motion of object and depends on mass and velocity if object
thermal energy
associated with the random motions of atoms and molecules
heat
involved an object possessing energy and a transfer of energy between two objects due to a difference in temperature, not a substance or state function
work
force acting over a distance
system
part of the universe that we are focusing attention on
surroundings
everything besides the system
intensive property
does not depend on amount of matter (ex temp, color)
extensive property
depends on amount of matter (mass, internal energy)
endothermic
heat flows into the system
exothermic
heat flows out of system
what is thermodynamics
the study of energy and its interconversions
1st law of thermodynamics
energy is converted, not created nor destroyed, often going from system to surroundings, total energy content in universe is constant
Esys + Esurroundings =
0
DELTA E =
q + w
endothermic q =
+
exothermic q =
-
if the system does work on surroundings, w =
-
if surroundings do work on the system, w =
+
