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System (Open or Control Volume (Definition (mass and energy flow through…
System
Open or Control Volume
Definition
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boundaries are called control surface, real or imaginary, can't move
Example
car radiator, turbine, water heater, pipe, boiling water with steam released
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Closed
Definition
fixed amount of mass, and no mass can cross its boundary
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volume does not have to be fixed, boundary may move
Example
piston cylinder, pressure cooker
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Isolated
Definition
fixed amount of mass and energy, none can pass through boundary
Example
soup in a thermos, universe as a whole, a system and its immediate surroundings
properties
Intensive
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temperature, density, pressure
Usually lowercase letters, except P and T
Extensive
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total mass, total volume , total momentum
usually uppercase letters, except m
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