⊿ Point. {R} Glossary. ◢ Keyword: C. ◥ University. {q} PhD. {tr} Training. ⚫ UK. ↂ EndNote. ☝️ Weerakkody. Closed system. Type of system A closed system is a natural physical system that does not allow transfer of matter in or out of the system, although – in the contexts of physics, chemistry, engineering, etc. – the transfer of energy (e.g. as work or heat) is allowed. In classical mechanics [edit] In nonrelativistic classical mechanics, a closed system is a physical system that does not exchange any matter with its surroundings, and is not subject to any net force whose source is external to the system.[1][2] A closed system in classical mechanics would be equivalent to an isolated system in thermodynamics.
Closed systems are often used to limit the factors that can affect the results of a specific problem or experiment. In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings. For a simple system, with only one type of particle (atom or molecule), a closed system amounts to a constant number of particles. Where is the number of j-type molecules, and.