Does the capacity of air to hold water vapour __ with an increase in temperature
The Correct Answer and Explanation is:
Correct answer:
Increase
Explanation:
The capacity of air to hold water vapor increases with an increase in temperature. This relationship is rooted in the principles of thermodynamics and the behavior of gases and liquids.
At higher temperatures, the molecules in the air move more rapidly. This increased kinetic energy allows water molecules to more easily escape from the surface of liquid water and enter the air as vapor. As a result, warm air can hold significantly more water vapor than cold air before becoming saturated.
Saturation occurs when air contains the maximum amount of water vapor it can hold at a given temperature. If more water is added beyond this point, it will condense into liquid, forming dew, fog, or clouds. Because warmer air can hold more water vapor, the relative humidity decreases as temperature rises if no additional moisture is added. Conversely, cooling air causes water vapor to condense more readily, which is why dew forms in the early morning when temperatures are low.
This concept is crucial in meteorology. For instance, tropical climates are often hot and humid because the warm air holds large amounts of water vapor. In contrast, colder regions tend to have drier air. It also explains why condensation forms on a cold surface when humid warm air comes into contact with it — the air cools quickly, reducing its capacity to hold water vapor and leading to condensation.
In practical terms, this principle influences weather forecasting, climate studies, and even indoor climate control systems. It also plays a role in precipitation, cloud formation, and the general water cycle of Earth.
In summary, as temperature increases, the capacity of air to hold water vapor increases because of the greater energy available to maintain water in its gaseous state.
