Chem 102: Thermodynamics Flashcards
Closed system
Energy can flow in and out of system but mass can not
Open system
Both mass and energy can flow in and out of the system
Isolated system
Neither mass nor energy can flow in or out of system
Formula for pressure
Force/area
Formula for force
Area * pressure
Formula:
Work (w)
W= -P ^V
^change in
+q means….
Heat flows….in/out
System gets…hot/cold
Heat flows INTO system from surroundings
System gets cold
-q means….
Heat flows….in/out
System gets…hot/cold
Heat flows OUT of system, into surroundings
System gets hot
System gets HOT means q is +/-
-q
System gets COLD means q is +/-
+q
If heat flows out of the system, q is….
-q
If heat flows into the system, q is…
+q
Isobaric
Constant pressure
Delta P=0
Isothermic
Constant temp
Delta T=0
Nano(meter)
Symbol…
Factor…
N
10^-9
Micro(meter)
Symbol…
Factor…
U (greek mu)
10^-6
Milli(meter)
Symbol…
Factor…
M
10^-3
Centi(meter)
Symbol…
Factor…
C
10^-2
Deci(meter)
Symbol…
Factor…
D
10^-1
Deca(meter)
Symbol…
Factor…
Da
10^1
Hecto(meter)
Symbol…
Factor…
H
10^2
Kilo(meter)
Symbol…
Factor…
K
10^3
Mega(meter)
Symbol…
Factor…
M
10^6
Giga(meter)
Symbol…
Factor…
G
10^9
Tera(meter)
Symbol…
Factor…
T
10^12
Isocoric
Constant volume
Rigid walls
Delta V=0
Adiabatic walls
Isolated system
No heat flow
q=0
Extensive property
Property that depends on the quantity of the substance present
Ex) mass, moles, free energy (E)
Intensive property
Property that is independent of the quantity of the substance present
Ex) density, molarity
Thermodynamic state
All possible combinations of P, T and V for a particular substance at equilibrium and independent of time.
Isobaric process
Change where P is constant but T and V change
Isocoric process
Change where V is constant but T and P change
Isothermal process
Change where T is constant but P and V change
Formla: Kinetic Energy
KE= (1/2) m * v(squared)
