When a gas is collected over liquid water, it becomes saturated with water vapor and exerts an individual partial pressure at that temperature, referred to as its_______________?
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Answer: A. Aqueous tension
Explanation
Aqueous tension refers specifically to the partial pressure exerted by water vapor in a gas mixture. Collecting gases over water saturates the vapor space according to ambient liquid temperature. Dalton law of partial pressures applies when calculating dry gas volumes from wet collections. Vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its liquid. Gas collection techniques often utilize water displacement methods in laboratory chemistry experiments. Temperature directly determines the saturation vapor pressure of water in enclosed systems.
Chemical laboratories correct measured gas volumes by subtracting aqueous tension values. Thermodynamic calculations involving humid gases require accurate partial pressure estimations. Atmospheric humidity studies rely on understanding vapor-liquid equilibrium pressure relationships. Saturated humidity measures moisture mass per unit mass of dry gas rather than pressure. Vapor pressure is a general term without specifying the water-over-liquid collection context. Absolute humidity represents the actual mass of water vapor present in a specific air volume.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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