Atmospheric Thermodynamics and Relative Humidity Alternate
Lab 1.06 Relative Humidity Alternate Lab Form
Answer the questions. When you are finished, submit this assignment to your teacher by the due date for full credit. (27 total point)
Pre-Lab Questions (7 total points)
1. How does temperature affect the air’s capacity to hold water vapor?
2. Using the chart below, what is the relative humidity for each of these?
Dry bulb
Wet bulb
Relative Humidity
100C
70C
24%
280C
220C
3. What four factors influence humidity? a. b. c. d.
(7 points)
3. Dry-bulb and wet-bulb data were recorded in trials. Use the data from the table of relative humidity values to determine the relative humidity, and then calculate the average relative humidity.
Temperatures of Dry-Bulb and Wet-Bulb Thermometers
Trial 1
Trial 2
Trial 3
Average
dry-bulb reading (°C)
22
22
22
wet-bulb reading (°C)
(after fanning)
18
17
19
difference between dry- and wet-bulb readings (°C)
relative humidity (%)
Do not put anything in the shaded area of the table.
To find the average relative humidity, add the relative humidities from each trial and then divide by 3.
(2points)
4. Based on the relative humidity in the room where the video was filmed, would a drop of water on a hand evaporate? Explain your answer.
(2points)
5. Based on the charts above, how is the difference between wet and dry bulb temperatures related to relative humidity?
(2points)
6. You and your friends spend the day at the county park swimming in the lake. The relative humidity of the air is 30 percent. Will you feel warm or cool when you step out of the water? Explain your answer in terms of humidity and evaporation.
You will need to search the internet for answers to the last 2 questions.
DO NOT copy and paste in an answer. Read about it and put it in your own words.
(2 points)
7. Some homes are cooled with evaporative coolers (swamp coolers). How do they work (in
Answer the questions. When you are finished, submit this assignment to your teacher by the due date for full credit. (27 total point)
Pre-Lab Questions (7 total points)
1. How does temperature affect the air’s capacity to hold water vapor?
2. Using the chart below, what is the relative humidity for each of these?
Dry bulb
Wet bulb
Relative Humidity
100C
70C
24%
280C
220C
3. What four factors influence humidity? a. b. c. d.
(7 points)
3. Dry-bulb and wet-bulb data were recorded in trials. Use the data from the table of relative humidity values to determine the relative humidity, and then calculate the average relative humidity.
Temperatures of Dry-Bulb and Wet-Bulb Thermometers
Trial 1
Trial 2
Trial 3
Average
dry-bulb reading (°C)
22
22
22
wet-bulb reading (°C)
(after fanning)
18
17
19
difference between dry- and wet-bulb readings (°C)
relative humidity (%)
Do not put anything in the shaded area of the table.
To find the average relative humidity, add the relative humidities from each trial and then divide by 3.
(2points)
4. Based on the relative humidity in the room where the video was filmed, would a drop of water on a hand evaporate? Explain your answer.
(2points)
5. Based on the charts above, how is the difference between wet and dry bulb temperatures related to relative humidity?
(2points)
6. You and your friends spend the day at the county park swimming in the lake. The relative humidity of the air is 30 percent. Will you feel warm or cool when you step out of the water? Explain your answer in terms of humidity and evaporation.
You will need to search the internet for answers to the last 2 questions.
DO NOT copy and paste in an answer. Read about it and put it in your own words.
(2 points)
7. Some homes are cooled with evaporative coolers (swamp coolers). How do they work (in