Definition of Standard Temperature And Pressure



That temperature and pressure which have been set as conditions for various experimental measurements are known as the standard temperature and pressure. This standard allows us to establish comparisons between a number of sets of data. The most widely used standards are those that are made up by IUPAC and NIST, however, they are not accepted universally.

 


According to IUPAC, the standard temperature is 273.16 K and the absolute pressure is 100 kPa. NIST has regarded their standard as normal temperature and pressure and according to them, 293.16 K is the standard temperature and the absolute pressure is 1 atm.

 

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