Question

The surrounding becomes pleasantly warm when water in a lake starts freezing in cold countries .Give reason.

Answer 1

The molecules of liquids will have more kinetic energy than molecules of solid.
Solids particles have less Kinetic energy and vibrate about their mean position.
So, when the water which is in liquid state, freezes ( converting water to ice) then it releases the heat to the surroundings .
It is exothermic process where heat is released to surroundings.

Hence ,the surrounding becomes pleasantly warm when water in a lake starts freezing in cold countries .

Answer 2

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1. In cold countries, in winter, a layer of ice is formed on the surface of lakes when the atmospheric temperature falls below 0°C.

2. However, below this layer, there is water at 4°C.

3. Ice, being a bad conductor of heat, does not allow transfer of heat from this water to the atmosphere.

Hence, aquatic animals and plants can survive in this water. Also, the surrounding becomes pleasantly warm when water in a lake starts freezing in cold countries.

Hope it helps!

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