Question
Write the difference between ideal gas and real gas.
| 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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