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Standard VI

Chemistry

Condensation

Why does a ba...

Question

Why does a bathroom mirror turn misty after a hot shower?

The mirror surface and water particles develop an attractive force between them.

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Due to the condensation of hot suspended water particles.

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Water has a low surface tension which makes the tiny water particles cling to the mirror.

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The glass tends to get dirty with time and it has nothing to do with water.

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Solution

The correct option is B Due to the condensation of hot suspended water particles.
You must have seen a bathroom mirror turning misty after a hot shower. The scientific phenomenon behind this is condensation.

When you are taking a hot shower, it heats up the surrounding air. Air has very tiny water particles suspended in it. These tiny water particles absorb the heat and when they fall on relatively cooler surfaces like a mirror, they are cooled and condense into water droplets which makes a mirror turn misty.
It is, for this reason as well that exhaust fans are used in bathrooms as they help in preventing vapour build up.

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