The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is___________?
Correct answer: C. Henry's law
- A. Dalton's law
- B. Gay Lussac's law
- C. Henry's law
- D. Raoult's law
Explanation
Henry's law states that, at constant temperature, the amount or concentration of a gas dissolved in a liquid is proportional to the gas's partial pressure above the liquid. Thus option c is correct. Students may choose Dalton's law because it also involves partial pressure, but Dalton's law concerns the total pressure of a mixture of gases, not gas solubility.
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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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