Question

Ice and water both are same substances but ice has greater volume than that of same amount of water . Why?

Answer 1

Most liquids contract as they are cooled; because the molecules are moving slower, they are less able to overcome the attractive inter molecular forces drawing them closer to each other. Then the freezing temperature is reached, and the substance solidifies, it contracts some more because crystalline solids are usually tightly packed.

Water is one of the few exceptions to this behavior. When liquid water is cooled, it contracts like one would expect - until a temperature of approximately 4°C is reached. Below this temperature, it expands slightly until it reaches the freezing point, and then when it freezes it expands by approximately 10%.

This unusual behavior has its origin in the structure of the water molecule. There is a strong tendency to form a network of hydrogen bonds, where each hydrogen atom is in a line between two oxygen atoms. This hydrogen bonding tendency gets stronger as the temperature gets lower (because there is less thermal energy to shake the hydrogen bonds out of position). The ice structure is completely hydrogen bonded, and these bonds form a crystal lattice, which is what we know as 'ice'.

Answer 2

hey frd there is your answer !!
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=> Because they had the same amount of "stuff," they have the same weight. The "stuff" (molecules) in water is moretightly packed than in ice, so water has greater density than ice. ... As waterfreezes it expands. So, ice has more volume (it takes up more space, but has less density) than water.

I hope you help !!!!!