The highest temperature at which a substance can exist as a liquid is called its______________?
Correct answer: A. Critical temperature
- A. Critical temperature
- B. Standard temperature
- C. Absolute temperature
- D. Upper consulate temperature
Explanation
The critical temperature is the highest temperature at which a gas can be liquefied by applying pressure, or equivalently the highest temperature at which the substance can exist as a liquid. The likely mistake is absolute temperature, which is temperature measured from absolute zero and is not a phase-limit term.
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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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