Question
Molar volume of gas.
✓
Answer
i. It is more convenient to measure the volume rather than mass of the gas.
ii. It is found from Avogadro law that one mole of any gas occupies a volume of $22.4 dm ^3$ at standard temperature ( 0 ${ }^{\circ} C$ ) and pressure ( 1 atm ) (STP).
iii. The volume of $22.4 dm ^3$ at STP is known as molar volume of a gas.
iv. The relationship between number of moles and molar volume can be expressed as follows:
[Note: IUPAC has recently changed the standard pressure to $1$ bar. Under these new STP conditions the molar volume of a gas is $\left.22.71 L mol ^{-1}\right]$
ii. It is found from Avogadro law that one mole of any gas occupies a volume of $22.4 dm ^3$ at standard temperature ( 0 ${ }^{\circ} C$ ) and pressure ( 1 atm ) (STP).
iii. The volume of $22.4 dm ^3$ at STP is known as molar volume of a gas.
iv. The relationship between number of moles and molar volume can be expressed as follows:
[Note: IUPAC has recently changed the standard pressure to $1$ bar. Under these new STP conditions the molar volume of a gas is $\left.22.71 L mol ^{-1}\right]$
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