Question

Give reasons:

(a) Water is used as a cooling agent.

(b) Water pipes burst in severe winters.

(c) It is difficult to cook in hills as compared to plains.

(d) Ice floats on water.

(e) Sea water does not freeze at 0°C​

Answer 1

$\huge\pink{Answer:}$

a) Water has high specific heat. Water neither heats up nor cools down quickly. This property makes water as a excellent cooling agent.

b)Water pipes burst during severe winters because Water freezes and expands inside your household pipes and Continual freezing and expansion of water inside the pipe causes pressure to build up between the ice blockage and the closed faucet.

c)At higher altitudes, say like mountains, cooking food is difficult. Higher altitudes means lower atmospheric pressure and thus lower boiling point. ... So, at higher altitude, food needs to be cooked for a longer time due to the lower in boiling point of water.

d)Ice floats on water because it is less dense than water. When water freezes into its solid form, its molecules are able to form more stable hydrogen bonds locking them into positions. ... Ice floats on water because it is less dense than water. Density is defined as mass per unit volume of a substance.

e)But sea water is not regular water and contains salt in it. The salt causes the rate of freezing to occur slower than the rate of melting, causing the ice to melt and requires a lower temperature to reattain equilibrium. Hence sea water freeze below [0] zero degree Celsius.

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