Processes Flashcards
1
Q
5 types of process
A
isobaric = CP isochoric = CV isothermal = CT isenthalpic = CH Adiabatic = q = 0
2
Q
isentropic relations
A
pv^(y)
Tv^(y-1)
T/p^(y-1)/y
3
Q
2nd Law of thermodynamics
A
the entropy of an isolated system never decreases! always evolves to equilibrium a state of max entropy.
4
Q
entropy changes (all substances)
A
TdS = dU + pdV TdS = dH - Vdp
5
Q
efficineicy of compressor
and turbine
A
Nc = isentropic work input/actual work input =
Nt = actual work output/isnetropic work output
6
Q
Throttling
A
isenthalpic for all fluids and isothermal for ideal
7
Q
Joule thompson effect and inversion temp
A
at inversion temp = negative coefficient = heats during throttling. vice versa
