Which of the following statements is correct?

Options

A. The presence of reacting species in a covered beaker is an example of open system
B. There is an exchange of enrgy as well as matter between the system and the surroundings in a closed system.
C. The presence of reactants in a closed vessel made up of copper is an example of a closed system.
D. The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed system.

Answer

C

Explanation

For a closed vessel made up of copper, no matter can exchange between the system and the surroundings but energy exchange can occur through its walls.