Open and Closed Systems and Phase Changes
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17 Terms
work non- flow
the area under the curve on PV diagram represents the _____
Closed Systems
work non flow is also called as
Open Systems
Systems under steady flow process
Flow Work or Energy Flow
Energy needed to push the substance across the system’s boundary.
WSF (Work steady flow)
area behind or at the back of the curve is equal to
𝚫PE= 0
Problems not mentioning elevation or datum, let
𝚫KE= 0
If not stated the change in the velocity or cross sectional areas
Wsf = 0
No piston moving nor shaft turning
Q= 0
Thermally insulated system, well and perfectly insulated or adiabatically walled system
positive work
work is done by the substance
negative work
work is done on the substance
Melting
solid to liquid
evaporation
liquid to gas
sublimation
solid to gas
freezing
liquid to solid
condensation
gas to liquid
deposition
gas to solid