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enricfemi
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consider a adiabatic system, when we compressing the gas, i found its entropy is decreasing.
but it should increasing in adiabatic systems.
but it should increasing in adiabatic systems.
enricfemi said:consider a adiabatic system, when we compressing the gas, i found its entropy is decreasing.
but it should increasing in adiabatic systems.
If you take an ideal gas cylinder, and expand or compress it "reversibly and adiabatically", then the change in the gas's entropy is exactly zero.
Entropy in compressing gas is a measure of the disorder or randomness of molecules in a gas. It is a thermodynamic property that indicates the amount of energy that is unavailable for work during a gas compression process.
Compressing gas increases the entropy of the system. This is because the compression process increases the disorder of the molecules, resulting in an increase in the number of possible microstates for the gas. This leads to an increase in the system's entropy.
There is a direct relationship between temperature and entropy in compressing gas. As the temperature of the gas increases, the entropy also increases. This is because higher temperatures result in greater molecular motion and therefore, increased disorder.
It is possible to decrease entropy in a compressing gas system by lowering the temperature. This can be achieved through processes such as adiabatic cooling, where the gas is compressed without any heat exchange with the surroundings. However, this requires a significant amount of energy and is not a common practice.
The increase in entropy during gas compression is a manifestation of the second law of thermodynamics, which states that the total entropy of a closed system can never decrease over time. This means that the entropy in a compressing gas system will always increase, regardless of the specific process used.