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The outer surface of a beaker containing ice cubes becomes wet in short while - Give scientific reason.

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Question  The outer surface of a beaker containing ice cubes becomes wet in short while. Answer  When ice cubes are placed in a beaker, ice starts melting.  The heat required for melting is absorbed from the surrounding air and also from the beaker to some extent.  Hence, the temperature of the air and beaker falls.  The capacity of air to hold water vapour depends upon the temperature of the air, and this capacity decreases as the temperature decreases.  At a certain low temperature, the surrounding air becomes saturated with water vapour present in it.  As the temperature falls further, the air is unable to hold all the water vapour.  Hence, the extra water vapour starts condensing on the cold outer surface of the beaker in the form of minute drops.  Therefore, The outer surface of the beaker containing ice cubes becomes wet in a short while.
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What is Heat Exchange

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Heat Exchange

1)If heat is exchanged between a hot and cold object, the temperature of cold object goes on increasing due to gain of energy and temperature of hot object goes on decreasing due to loss of energy.

2)The change in temperature continues till the temperature of the both object attain the same value.

3)In this process, cold object gain energy and hot object loses energy.

4)If the system of both the object is kept isolated from the environment by kipping inside a heat resistance box, no energy can flow from inside the box or come into the box.

Principle Heat Exchange

Heat energy lost by hot object = Heat energy gained by cold object.
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