Closed systems are able to exchange energy (heat and work) but not matter with their environment.

Closed systems cannot exchange matter with the surroundings, but can exchange energy.

It may only exchange energy in the form of heat with the outside.

Grand-canonical ensemble: used in open systems which exchange energy and mass with the outside.

During some transformations, the engine may exchange energy with its environment.

"None of the naguals who exchanged energy with him was injured," he replied.

A living organism is an open system, able to exchange both matter and energy with its environment.

When two systems come into thermal contact, they exchange energy through the microscopic interactions of their particles.

In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings.

Closed system: a system which can exchange energy (as heat or work), but not matter, with its surroundings.