Question

Water in lakes and ponds do not freeze at once in cold countries.Give reason.

Answer 1

due to anamolous expansion of water

Answer 2

Answer:

Water in lakes and ponds do not freeze in cold countries due to the specific latent of heat of ice is sufficiently high ( = 336 J g^-1 ) .

Explanation:

• Before freezing, the water have to liberate a large amount of energy to the surrounding.

• It does not freeze at once.

• Due to low temperature,

▪︎the layer of ice is formed over the water surface , which is a poor conductor of heat .

▪︎ This formed layer of ice, a poor conductor of heat, which prevents the loss of heat from the water of lake .