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EXPERIMENT: DEW POINT

Define dew point
Determine the dew point of the surrounding air
Collect data and summarize findings
These supplies are needed:

shiny metal can
ice cubes
water
thermometer
stir rod or spoon
Follow these steps:

1. Record the temperature of the air.
2. Fill a shiny metal can with water at room temperature.
3. Slowly add ice to the water and stir gently with stir rod or spoon. Continue to add ice until a film of water appears on the surface of the metal can.
4. Record the temperature when the dew develops on the can.
5. Repeat this experiment to confirm the data.

Write a scientific summary of your findings. Include your hypothesis, data, observations, and conclusion. Be sure to answers the questions below in your report as well as explaining your method and results.
Why must the metal can be shiny?
Why must the ice be added slowly?
What advantages would be in repeating the experiment several times?
What is the average dew point?
If possible, compare your findings with someone else who did the experiment. How are your results similar or different, and why?
What did you find out from this investigation? Be thoughtful in your answer.

User Slavus
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1 Answer

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The dew point is the temperature at which condensation begins to form. By following the steps of the experiment and recording the temperature at which condensation appears on a shiny metal can filled with water and ice, the dew point of the surrounding air can be determined. Repeating the experiment helps ensure accurate results and allows for comparison with others.

The dew point is the temperature at which air becomes saturated with water vapor and condensation begins to form. In this experiment, the dew point of the surrounding air is determined by observing the temperature at which condensation appears on a shiny metal can filled with water and ice. By slowly adding ice to the can and recording the temperature when dew develops, the dew point can be measured.

The metal can must be shiny because a shiny surface promotes condensation by providing a cooler surface for water vapor to condense on. Ice is added slowly to allow the air inside the can to cool gradually, reaching its dew point more accurately. Repeating the experiment several times helps to ensure consistent results and allows for the calculation of an average dew point.

In order to compare findings with someone else who did the experiment, the results can be analyzed for similarities or differences. Factors such as temperature, humidity, and location could affect the dew point, leading to variations in results. This investigation helps in understanding how temperature and moisture in the air affect the formation of dew and the condensation process.

User HKVariant
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