GChemOChem - Thermodynamics and Heat Capacities Flashcards
Open system exchanges ____ and ____ with its surroundings. I.e me
matter, energy
Closed system exchanges ___ but not _____. i.e a pop can
energy (gets colds, matter (pop)
an extensive property depends on the amount of ___ present in the system. i.e mass, volume
matter
an intensive property does not depend on the amount of _____ present in the system. i.e temperature
Matter
Zeroth Law states
ABC will all be the same temo
KE = 3/2TR = 1-2mv^2
State functions are properties that depend only on final and initial states, and not the ___ taken. (displacement)
path
Path states are properties of a system that depend on the way in which it was ______ out. (distance)
carried. The path
All state functions have __ letters. All path functions have ____
capital, lowercase
what is 0C in K?
273K
Electronic energy is the attraction between electrons and their ___
nucleus
Translation energy is largely the same as kinetic tem which is therefore ..
temperature
w=-P*V units are in
kPa*L=J (ensure it is in Pa)
if we want positive work we need a contraction or expansion
contraction (2 negs to cancel) w=-P*V
change in E = q + w
heat + work
dE= q + w
the change in enthalpy (d) equals the heat gained or lost at a constant _____
pressure
dH = dE + (dn)RT
change in enthalpy is the change in energy plus the change of moles x RT
Hess’s law states that the total enthalpy of the overall rxn is equal to the sum
Have no fear of ice cold beer tells you the diatomic atoms and the states
I2 is a solid (ice) and Br2 is a liquid (beer)
H2, N2, F2, O2, I2, Cl2, Br2
standard formation is forming 1 mol of the products from pure elements
Entropy is chaos denoted as (dS)
chaos
dS = q/T
Entropy is a cutie (q-t)
determining entropy look at which side has more moles of ___
gas
Entropy can have a change in phase OR change in temperature. NOt both @ same time
The Second law of thermodynanics is “sad” because it is ______
irreversible
The third law of therm is a “tie” because to have 0K it needs to be a perfect ___
dG = dH - TdS
change in gibs is equl to the change in enthaly -temperaturexchangein entropy
dG = RTln(Q/K)
it is an intensive property if it is divided by a mass
dG has to be ___ for it to be spont
negative
Fusion is going from a solid to a ___
liquid
sublimation is solid to a ___. “sublimation starts as a solid”
gas
deposition is gas to a ___
solid
Triple point occurs at the intersection of the three phase-transition lines. at this point, all three phases are in ____
equilibrium
q = mcdT
c is heat capacity
