Isolated System

Isolated System

An isolated system can exchange neither matter nor energy with its surroundings.

This is the most restrictive type. The textbook gives the example of reactants inside a thermos flask (a Dewar flask) or any closed, insulated vessel. The walls are both sealed (no matter exchange) and made of a non-conducting material (no heat exchange). In an ideal isolated system, the total energy of the system remains constant. …