Why does the cold water bottle or cold drinks bottle sweat?

Always the outside air contains some water in the invisible state (Gaseous State).When the cool drink or water bottle cools the outside air, the outside air gives some water in the visible state (Liquid State). The water from the outside air stays outside the bottle and looks like the bottle sweats.

Why does the cold water bottle or cold drinks bottle sweat?
Why does the cold water bottle or cold drinks bottle sweat?

Why does the cold water bottle or cold drink bottle sweat?

 

          Have you ever wondered or had a thought about why the closed bottles which contain the cold water or cold drinks sweat?  Have you asked from where the water comes?

            Actually the fact is that neither the bottle sweats nor the water comes from the inside of the bottle. The water is from the outside atmosphere.

       Description: C:\Users\Manova\Desktop\1200px-Condensation_on_water_bottle-300x240.jpg

            Always the atmospheric air contains some water in the gaseous state (water has three phases i.e. Solid phase – ice, Liquid phase – water, Gaseous state – vapour). When the air is in high temperature the moisture (water vapour in the air in gaseous state) content will be greater which means air can hold moisture content more. When the temperature of the air is low the moisture content the air can hold is also low.

High temperature air – more moisture content

Low temperature air – less moisture content

            When the air is cooled it cannot withstand the moisture and it condenses to water.

Air at high temperature + more moisture content

↓cooling

Air at low temperature + water + less moisture content

            The air surrounding the bottle gets cooled by the cold drink. When the air is cooled it cannot hold more moisture. So some moisture condenses and becomes water. This water stays outside the bottle and makes us to think the bottle sweat.

Terms Used:

  1. Atmospheric air: The air on the surface of the earth.
  2. Moisture: The water contains in the air as gaseous phase.
  3. Phase: The state of a substance. Generally solid, liquid, gas.
  4. Vapour: Any liquid in the gaseous phase. (For water it has a specific name called steam usually with hot)
  5. Condensation: The conversion of a substance from the gaseous state to liquid state is called condensation.

 

Summary: 

 Water  →      

  Solid state       –   ice        - visible,

 Liquid state     –  water    - visible,  

 Gaseous state  –  Vapour - invisible.

          Always the outside air contains some water in the invisible state (Gaseous State).When the cool drink or water bottle cools the outside air, the outside air gives some water in the visible state (Liquid State). The water from the outside air stays outside the bottle and looks like the bottle sweats.

 

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