Answer:
A can of soft drink being transferred from the room temperature to a refrigerator is a closed system.
Explanation:
When a can of soft drink is transferred to a refrigerator from room temperature then only energy transfer can occur i.e. the heat of soft drink is absorbed by the refrigerator but the quantity of mass packed in the can does not gets altered.
From the thermodynamic point of view a closed system is one in which the mass content of the system does not changes only the energy transfer can take place through the boundary of the system.
