Lessons 18 and 19

Lesson 18 – Feeling Humid

In this lesson we learned about humidity, relative humidity and what cause condensation to occur and how it relates to humidity of the air. Humidity is the density of water vapor in the air at any time or temperature. Humidity depends on the temperature and pressure of the air. The temperature at which condensation occurs, or when water vapor condenses to form water, indicates how much water vapor is in the air. Relative humidity, on the other hand, is the amount of water vapor in the air compared to the maximum amount of water vapor that is possible at that temperature (maximum overall is 100%). Relative humidity is expressed as a percentage. Here are some practice problems to help further explain. I used the image below to answer the questions. (:

– What is the maximum vapor density possible at 30 degrees celsius?
* about 1.7 mol per 1,000 L

– When the humidity is 25% and the temperature is 30 degrees celsius, what is the water vapor density?
* x/1.7= 0.25. x = 0.425 = 0.43 mol per 1,000 L

Lesson 19 – Hurricane

In this lesson we learned about the characteristics and formation of hurricanes. A hurricane is a destructive storm with strong winds and heavy rains. Hurricanes can begin as tropical depressions, which then lead to tropical storms and sometimes build to hurricanes. The intensity of a hurricane is
categorized as 1 being the least intense and 5 being the most. Hurricanes form over the ocean in places where the air is extremely warm and moist, typically being around low pressure systems. However, when a hurricane builds builds from a tropical storm, it begins forming when a great deal of warm water evaporates into the atmosphere and the evaporation increases as it moves into areas of warmer water. Here is a practice problem. (:

– What conditions are necessary for hurricane formation?
* In order for a hurricane to form, there must be extremely warm air in an area of the ocean and very moist air.

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