Raising absolute humidity affects the dew point of an unsaturated air-water vapor mixture (at constant T and P) by ?
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Answer: A. Increases
Explanation
Raising the absolute humidity increases the partial pressure of water vapor in the air mixture. Higher vapor pressure requires a higher saturation temperature to maintain phase equilibrium conditions. The dew point temperature corresponds directly to the saturation temperature of the existing vapor pressure. Absolute humidity represents the actual mass of water vapor present in a given mass of air. Dew point is the temperature at which air becomes fully saturated and condensation begins forming. Psychrometric charts illustrate the direct relationship between absolute humidity and dew point temperature.
Monitoring dew point is essential in industrial drying processes to prevent unwanted moisture condensation. Meteorologists track absolute humidity changes to forecast fog formation and precipitation events accurately. Engineers design environmental control systems to manage dew points and protect sensitive manufacturing equipment. Remains unchanged incorrectly implies that adding moisture to air has no effect on its saturation properties. Decreases contradicts thermodynamic principles since adding moisture raises the required condensation temperature. Decreases linearly ignores the exponential nature of vapor pressure curves relative to temperature changes.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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