Units and Measurement
© examsnet.com
Question : 17
Total: 33
One mole of an ideal gas at standard temperature and pressure occupies 22.4 L (molar volume). What is the ratio of molar volume to the atomic volume of a mole of hydrogen? (Take the size of hydrogen molecule to be about 1 Å). What is this ratio so large?
Solution:
Atomic volume =
π R 3 × N
=
π ( 0.5 × 10 − 10 ) 3 × 6.023 × 10 23
Molar volume= 22.4
= 22.4 × 10 − 3 m − 3
=
= 7.1 × 10 4
The large value of ratio shows that the inter molecular separation in a gasis much larger than the size of a molecule.
Molar volume
The large value of ratio shows that the inter molecular separation in a gasis much larger than the size of a molecule.
© examsnet.com
Go to Question: