# thermo

### Card Set Information

 Author: Anonymous ID: 174595 Filename: thermo Updated: 2012-09-30 22:26:41 Tags: thermo Folders: Description: test 1 Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user Anonymous on FreezingBlue Flashcards. What would you like to do?

1. thermodynamics
how a hot body can perform work
2. classical thermo vs statistical
• classical - more direct, less math complications
• statistical - Laser, plasma, high-speed gas flowchem. kinetics, cryogenics derivation ideal gas spec. heat
3. system
whatever we want to study.
4. Surroundings
everything external to thesystem.
5. Boundary
distinguishes system from itssurroundings.
6. closed system
constant matter
7. Isolated system
special typeof closed system that doesnot interact in any way with itssurroundings.
8. Control Volume/open system
Mass may cross the boundry
9. Extensive Property
mass, volume, energy
10. Intensive property
temperature, pressure, spec. volume
11. State
Systems condition, described by it's properties
12. process
Change of state, Change of atleast one property
13. Cycle
Sequence of processes that begins and ends with same state
14. non-properties
mass flow and energy transfer, because takes two states to know the change.
Properties do not change with time.
16. equilibrium
isolated system when properties stop changing
17. Phase
Homogenous chemical and structural matter
18. Specific volume
1/p = kg/m^3
19. Pressure
Force/Area
20. pressure unit
1pa = 1N/m2
21. bar conversion
1bar = 10^5N/m2
22. Absolute pressure
P = Pguage + Patm
23. Vacume pressure
Pvac = Patm - P
24. Kelvin celsius ralationship
T(C) = T(K) - 273
25. First law of thermo
• Energy is conserved
• ΔE = ΔPE+ΔKE+ΔU
• ΔE = Q - W
26. Work sign standard
• Into system is neg
• out of system is pos
27. Heat sign standard
• Heat out is neg
• Heat in is pos
28. Work Equation
W = ∫ pdV = ∫Fdx = ∫ pAdx
29. polytropic process
pVn = constant
30. Heat transfer types
• Convection - through a medium
• Conduction - direct touching transfer
31. Rerfrigeration cycle
• provide cooling
• Wcycle = Qout-Qin
• B=Qin/Wcycle = Qin/(Qout-Qin)

32. Power cycle
• Wcycle =Qin - Qout
• n = Wcycle/Qin = (Qin-Qout)/Qin
33. Heat Pump Cycle
• Wcycle = Qout - Qin
• y = Qout/Wcycle = Qout/(Qout - Qin)
34. Vapor Dome
Dome shaped region of the Two-phase liquid-vapor states
35. Critical Point
• the Max of the vapor dome
• Max temp and pressure the two phase can coexist
36. Quality
X = mvapor/(mvapor+mliquid)
37. Enthalpy(h)
h = uspecific + pvspecific

38. .415%
• dW/dT = .2Kw
• T = ~92.5sec

What would you like to do?

Home > Flashcards > Print Preview