What happens to a gas when it suddenly expands?

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The discussion centers on whether rapid expansions of gas are endothermal processes. It is clarified that such expansions are generally considered adiabatic, meaning there is insufficient time for heat transfer with the surroundings. The behavior of the gas during expansion can vary based on the specific system and modeling approach used. Understanding these distinctions is crucial for accurately analyzing gas behavior in different scenarios. The conversation highlights the importance of thermodynamic principles in evaluating gas expansion processes.
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My friend and i were talking about this a few days ago and he told me the process was endothermal.Is this true?If so,why?
 
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bac said:
My friend and i were talking about this a few days ago and he told me the process was endothermal.Is this true?If so,why?

Rapid expansions of gas are typically treated as adiabatic processes since it is assumed that there is not enough time (due to the rapid expansion) for the gas to have any heat transfer with its surroundings.

What happens to the gas really will depend on the system and how one models it.

CS
 

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