standard state
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Process calculations require a standard state; I remember that it was 100 kPa back in school, but when checking manuals, some specify 100 kPa while others specify 101.325 kPa. Why are there two values? Perhaps I’m mistaken; I would appreciate some guidance from those more knowledgeable than me.
This is a matter of regulation; previously 101.325 was more commonly used, while later 100 was more common, but some have not been changed to the unified value
100 kPa is a rounded value for simplicity; the standard conditions are 101.325 kPa at 0 degrees Celsius.
It’s the difference between spoken and written language, right? OP, it now takes 40 bytes to reply – it’s so difficult
Yours are the physical and engineering terms; if you work in research, it’s necessary to use more precise terms, but in engineering things are different
From a physicochemical perspective, it used to be 101.325, but it was later changed to 100
100 Kpa is an engineering atmosphere, equivalent to a water column height of 10 M. As for the definition of temperature under standard conditions, it is not entirely consistent either
The standards are not yet unified; it depends on where you use it. In fact, as long as consistency is maintained when making conversions, that’s sufficient.