What is the volume of one mole of any gas at STP?

2 Answers
Nov 19, 2015

Answer:

#22.4L#

Explanation:

The volume of one mole of an ideal gas at STP can be found as follows:

First, What is STP?

STP is the standard conditions of Temperature and Pressure, where, #T=273K# and #P=1atm#.

Since we are looking for the volume of one mole, then #n=1mol#.

Using the ideal gas law: #PV=nRT# we can find the volume by:

#V=(nRT)/P =(1cancel(mol)xx0.08206(L*cancel(atm))/(cancel(K)*cancel(mol))xx273cancel(K))/(1cancel(atm))=22.4L#

Nov 19, 2015

Answer:

The volume of one mole of a gas is either #"22.414 L"#, or #"22.711 L"#, depending on the pressure used for #"STP"#.

Explanation:

It depends on what values you use for #"STP"#. If you use the values of #"273.15 K"# and #"1 atm"#, the volume of one mole of a gas is #"22.414 L"#.

However, the IUPAC and NIST have updated the values for #"STP"# to #"273.15 K"# and #"10"^5 "Pa"# or #"100 kPa"#. With these values, the volume of one mole of a gas is #"22.711 L"#.

http://en.citizendium.org/wiki/Reference_conditions_of_gas_temperature_and_pressure#Molar_volume_of_a_gas