ThermoDynamics Flashcards
Open System
Exchanging Stuff (matter, gas,smoke,carbon)
Closed System
Only exchanging energy (such as heat)
Isolated System
Thermally insulated (no energy or matter exchange)
Radiation allows energy to transfer through a…..
vacuum
Work by me is (negative or positive)?
negative
work done to me is (negative or positive)?
positive
Pressure*change in volume=?
Work
specific heat. What is it?
How fast it accepts or releases heat (low c means faster the change) (high c means takes a while to heat)
sauce and cheese on pizza
sauce has a HIGHER specific heat, it holds heat longer (if the specific heat is too high, such as wooden spoon, never reaches temperature to absorb energy)
c of water
4.18 J
no volume change equals (isovolumetric, isochoric)
no work (W=0)
adiabatic
no heat exchange (Q=0) (instantaneous)
isothermal
no energy exchange (Q=W) (slow)
Bond Energy Slide
Shortest length bond?
triple (also the strongest)
More electronegativity equals stronger or weaker bond?
stronger (less energy to blow)
Breaking bonds requires….
more energy
making bonds requires…
releasing energy
enthalpy =
heat
reactants - products
change in enthalpy
Energy is represented by the letter….
U
delta h= delta u + delta pv
Open container, all aqueous
Constant pressure, constant volume, repectively
Combustion Engine (See slide)
Reverse Heat Engine (Fridge) (See Slide)
delta g
change in free energy
Path indepedent?
PpTVHUGS
Pressure, density, temp, vol, heat, energy, gibbs free, entropy
isobaric
no pressure chamge
isochoric
isovolumetirc
high specific heat
hold heats longer
Latent Heat
deals with phase change (heat absorbed that does not change temperature)
q=mL
Boiling point is when
atm pressure is equal to vapor pressure (thus at lower pressures, things boil faster)
Radiation is trasnferred mainly by which type of radiation?
infrared electromagnetic waves
Work Diagram
