Question
Write the difference between ideal gas and real gas.

Answer

 
Ideal Gas
Real Gas
(i)
It obeys ideal gas equation, $\text{pV}=\mu\text{RT}$ at all temperatures and pressures
It does not obey, $\text{pV}=\mu\text{RT}$ at all values of temperature and pressure.
(ii)
The volume of the molecules of an ideal gas is zero.
The volume of the molecules of a real gas is non-zero.
(iii)
There is no intermolecular force between the molecules.
There is intermolecular force of attraction or repulsion depending on whether intermolecular separation is larger or small.
(iv)
There is no intermolecular potential energy (U) because intermolecular force (F) is zero.
Potential energy (U) does not equal to zero as intermolecular force (F) is not zero.
(v)
It has only kinetic energy.
It has both kinetic and potential energy.
(vi)
At absolute zero, the volume, pressure and internal energy become zero.
All real gases get liquified before reaching absolute zero. The internal energy of the liquified gas is not zero.

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