What is the definition of standard temperature and pressure (STP)?
1 Answer
Oct 5, 2017
Standard Temperature and Pressure is defined by IUPAC as:
#0^@ "C"# and#"1.000 bar"# after 1982#0^@ "C"# and#"1.000 atm"# before 1982
The numerical difference is that one obtains a molar volume of ideal gas to be:
#"22.414 L/mol"# at#0^@ "C"# and#"1.000 atm"# .#"22.711 L/mol"# at#0^@ "C"# and#"1.000 bar"# .
and the universal gas constant is:
#"0.082057 L"cdot"atm/mol"cdot"K"# at#0^@ "C"# and#"1 atm"# .#"0.083145 L"cdot"bar/mol"cdot"K"# at#0^@ "C"# and#"1 bar"# .
where
#"1.000 bar"# #=# #"100000 Pa"# #"1.000 atm"# #=# #"101325 Pa"#
As such, you should always specify which pressure your STP uses for your textbook for your course.
Note that