Under which conditions, is a real gas approximate to an ideal gas?
Correct answer: D. Pressure= low density= low
- A. Pressure = hign density = high
- B. Pressure = low density = high
- C. Pressure = high density = low
- D. Pressure= low density= low
Explanation
This option represents conditions where both the pressure and density of the gas are low. Under these conditions, the gas particles are far apart and have relatively weak intermolecular forces. As a result, the gas is more likely to behave like an ideal gas.
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About Real and Ideal Gases
An ideal gas is modelled as particles with negligible volume and no intermolecular attraction, obeying Boyle's, Charles's and Avogadro's laws through PV = nRT. Real gases deviate from this behaviour, especially at high pressure and low temperature, because particle volume and attractive forces matter; the van der Waals equation explains these corrections.
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