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Why a closed system can't be called as a Controlled Volume system?
This is not the conventional terminology that is used.holdmenow said:I agree with mexcheme.
Control volume means a device is used to control the volume; commonly valve is used.
Closed system is used usually in refrigerant system.
A thermodynamic system is a region of space that is under study and contains a certain amount of matter or energy. It can be a single substance or a mixture of substances and is typically separated from its surroundings by a boundary.
A closed system is one where neither matter nor energy can enter or leave, while a controlled volume system allows for the transfer of matter but not energy. In other words, a closed system has a fixed mass, while a controlled volume system has a fixed volume.
A closed system maintains its energy balance through internal processes such as heat transfer, work, and changes in internal energy. This means that the total energy within the system remains constant, but it can be redistributed among different forms.
Yes, a closed system can be in thermodynamic equilibrium when the macroscopic properties of the system, such as temperature, pressure, and density, remain constant over time. This means that there is no net flow of matter or energy within the system.
Examples of closed systems include a sealed container of gas, a chemical reaction in a closed vessel, and the Earth's atmosphere. Controlled volume systems can be seen in devices such as pumps, turbines, and piston-cylinder arrangements used in heat engines.