alleryStart learning →Standard temperature and pressure for reporting gas properties is defined as which pair?
A298.15 K and 1 bar
B273.15 K and 1 bar
C298.15 K and 1 atm
D273.15 K and 1 atm
Answer & Solution
Correct answer: D. 273.15 K and 1 atm
1. Gas volumes shift with temperature and pressure, so chemists agree on a reference point for reporting them.
2. That reference is standard temperature and pressure, written STP.
3. Standard temperature is 273.15 K, which is 0 degrees C.
4. Standard pressure is 1 atm, which is 101.325 kPa, not the rounder 1 bar.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 9 "Gases", section 9.2 Relating Pressure, Volume, Amount, and Temperature: The Ideal Gas Law_
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