Boiling water - amount of steam

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SUMMARY

The discussion centers on the observation that the amount of steam emitted from a kettle increases when the heating is turned off. This phenomenon occurs because what is perceived as "steam" consists of condensed water droplets, rather than invisible water vapor. When the heat is removed, the water vapor condenses more rapidly, leading to a greater visible output of steam. This thermodynamic behavior explains the increase in steam production after the heat source is removed.

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  • Understanding of basic thermodynamics
  • Familiarity with the properties of water and phase changes
  • Knowledge of steam and condensation processes
  • Experience with experimental observation techniques
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  • Research the principles of phase transitions in thermodynamics
  • Explore the concept of latent heat and its effects on boiling water
  • Investigate the properties of water vapor and condensation
  • Examine different kettle designs and their impact on steam production
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This discussion is beneficial for physics students, educators, and anyone interested in thermodynamics, as well as culinary professionals seeking to understand the science behind boiling water and steam generation.

wasia
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Hello!

There is an observation I have made when boiling water - amount of steam getting out of the kettle increases when the heating is turned off. Could anyone help to explain that?

The experiment goes like this. Take a kettle, start heating the water. The amount of the steam getting out increases (the kettle has a small hole at the top of it). When the water approaches the boiling point, the steam is getting out of the kettle at an impressive rate. However, if the heating is turned off (before or after boiling - does not matter) the amount of steam increases even further.

I wonder if
a) I am unable to judge the amount of steam accurately.
b) The form of the kettle (tested on 2) is relevant.
c) There is a good thermodynamical explanation.

Thanks.
 
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This is a common observation. What we're calling "steam" here is condensed water droplets (technically, steam is invisible water vapor). When you turn off the heat, the water vapor leaving the water surface condenses sooner, and the amount of "steam" therefore increases.
 

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