Real gases behave ideally at:
Correct answer: C. High temperature and low pressure
- A. Low temperature and low pressure
- B. Moderate temperature and low pressure
- C. High temperature and low pressure
- D. High temperature and high pressure
Explanation
Generally gas behaves more like an ideal gas at higher temperature and low pressure, as P.E due to intermolecular forces become less significant compared with particle kinetic energy. Real gas behaves like an ideal gas at high temperatures and low pressure.
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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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