SYSTEM

System

IA quantity of matter or a region in space chosen for study.

Closed System

No mass can cross the boundary (e.g., a container of liquid or gas).

Open System

Mass can cross the boundary (e.g., water valve, nozzle, compressor).

Isolated System

No mass, heat, or work can cross the boundary of a container (e.g., a perfectly insulated thermos bottle).

PROPERTIES OF A SYSTEM

Property

Measurable characteristics of a system.

pressure
temperature
volume
mass