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ReneAn example of work done on a system is when a computer's operating system is upgraded to a newer version. This involves installing new software, updating existing programs, and configuring settings to improve performance and security. The work done on the system aims to enhance functionality and overall user experience.
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Can work done on a system decrease its thermal energy?
Yes. As an example: if you define a refrigerator as your system, the work done on the system causes heat to be expelled from the system to the surroundings. The net heat expelled will be equal to the work input plus the decrease in its thermal energy.
When a system is doing work what happens to its temperature?
When a system is doing work, it can either increase or decrease in temperature depending on the type of work being done. If work is done on the system, its temperature may increase due to the input of energy. Conversely, if the system is doing work on its surroundings, it may lose energy and decrease in temperature.
What is the first law of thermodynamics applied to closed and open system showing the meaning of the positive and negative sign of heat and work?
The first law of thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. For a closed system, heat added to the system is positive if it is absorbed by the system, and negative if it is released by the system. Work done by the system is positive if the system does work on its surroundings, and negative if work is done on the system. For an open system, the same principles apply but heat and work may also account for changes in the system's mass flow.
If work is don adiabatically on a system will the internal energy increase or decrease?
If work is done adiabatically on a system, the internal energy will increase. This is because adiabatic processes do not involve the exchange of heat with the surroundings, so any work done on the system will directly contribute to an increase in its internal energy.
When is work done positive?
There are two conventions. One says that work done on the system is positive, the other says that work done by the system is positive. Chemists tend to use the former, physicists tend to use the latter... one of several reasons it's not a good idea to take thermodynamics in chemistry and physics at the same time.
