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| Q. |
If the temperature of a place increases suddenly, the relative humidity – |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | Fluctuates |
| Answer» B. Decreases | |
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Explanation: Relative humidity is the ratio of the partial pressure of water vapor in an air- water mixture to the saturated vapor pressure of water at a prescribed temperature. The relative humidity of air depends not only on temperature but also on the pressure of the system of interest. If the system at State A is isobarically heated (heating with no change in system pressure) then the relative humidity of the system decreases because the saturated vapor pressure of water increases with increasing temperature. |
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