unless the humidity is 100% in the room, the water on the walls is condensation not humidity. himidity needs to be 100% before it turns in to water.
Dew point and frost point
Associated with relative humidity is
dew point (If the dew point is below freezing, it is referred to as the frost point). Dew point is the
temperature at which water vapor saturates from an air mass into liquid or solid usually forming
rain,
snow,
frost, or
dew. Dew point normally occurs when a mass of air has a relative humidity of 100%. This happens in the
atmosphere as a result of cooling through a number of different processes.
Condensation
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For Chemistry, see
Condensation reaction.
For Physics, see
Condensed matter physics.
Water vapor condenses into liquid after making contact with the surface of a cold bottle.
Condensation on a window during a rain shower.
Condensation is the change of the physical state of aggregation (or simply state) of matter from gaseous phase into liquid phase.
[1] When the transition happens from the gaseous phase into the solid phase directly, bypassing the liquid phase the change is called
deposition, which is the opposite of
sublimation.
Condensation commonly occurs when a vapor is cooled to its
dew point, but the dewpoint can also be reached through compression. The condensed vapor is called a
condensate, the laboratory or the industrial equipment used for condensation is called a
condenser.
The science of studying the thermodynamic properties of moist air and the interrelationships between these in order to analyze, and predict properties by changing in the conditions of moist air is called
psychrometry. The interrelationship can be graphically represented, and prediction carried out graphically by the
psychrometric chart Most people think the water
is condensation, but condensation is only the process of change.
Water vapor that naturally condenses on cold surfaces into liquid water is called
dew. Water vapor will only condense onto another surface when the temperature of that surface is cooler than the
temperature of the water vapor. The water molecule brings a
parcel of heat with it. In order to have condensed, the molecule tranfers its
kinetic energy to the atmosphere. When water vapor condenses into liquid water, the hydrogen bonds form again and release latent heat, which increases the sensible heat and causes the air temperature to rise.
Sensible heat is removed from the air and the temperature drops when evaporation is occurring and latent heat is converted to sensible heat and the temperature rises when condensation occurs.
