Open vs closed system

[Aya Watson 2B]

I understand how energy can be exchanged w the surroundings in an open system, but I don't understand how it can happen in a closed system. Can someone please explain further?

[Jamie Lin 1K]

Energy can be exchanged in a closed system because the system allows for heat and work to be transferred between the system and surroundings. For instance, in an instant cold pack, matter is not exchanged. However, the cold pack(system) absorbs heat from the surroundings. This means the cold pack is an example of a closed system.

[Simone Byun 1F]

I found the example that Prof used in lecture a lot, which is a beaker of water. In an open system, water would be able to evaporate from the beaker and the beaker would not serve as an insulator either. However, for a closed system where the beaker is sealed, water would not be able to evaporate, but the beaker would still not serve as an insulator. I believe that this would lead to an exchange of energy because even though the system is closed, the temperature of the water can still change.

[Prithvi Raj 3E]

The energy in a closed system can increase when the system is heated or cooled. This results in a change in temperature, as the container of the closed system serves as an insulator.

[105691548]

In a closed system, according to the first law of thermodynamics, energy must be constant and can not increase or decrease without an encounter with its surroundings. An example of a closed system where the energy is constant is the contents of a pressure cooker on a stove with its lid tightly closed since no mass can enter or leave the pressure cooker but the heat can be transferred to it.