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.
  15. Steady state
    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
    • Radiation - energy waves 
    • 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