A closed system is a type of thermodynamic system where mass is conserved within the boundaries of the system, but energy is allowed to freely enter or exit the system. In chemistry, a closed system is one in which neither reactants nor products can enter or escape, yet which allows energy transfer (heat and light).
Likewise, what do we mean by closed system?
In nonrelativistic classical mechanics, a closed system is a physical system that doesn’t exchange any matter with its surroundings, and isn’t subject to any net force whose source is external to the system. A closed system in classical mechanics would be considered an isolated system in thermodynamics.
Is a car a closed or open system?
If the engine is cooled by a contained fluid system, that in turn is cooled by separate air/water that is not recirculated, like almost all car engines, then it is a closed system. But then heat is energy, which cannot be destroyed, only transformed, so in that sense, the universe is a closed system.