Question

Take small but equal amounts of water and milk in two different but similar containers. Freeze them by putting in a refrigerator. Now melt them in the sunshine, boil them on the same stove under the same conditions, and evaporate them completely. Note their temperature and time during changing of their states. What similarities and differences you find while changing the states of both of the materials. Support your investigation results with time and temperature graph.​

Answer 1

An Equal Amount Of Water And Milk Is Taken In A Similar Container :

Following Are The Observation

FREEZING MILK AND WATER:

• Milk freezes faster than water
• It is because of higher density of milk than water
• The freezing point of milk is -0.5250°C to -0.5650°C
• The freezing of water is 0°C
• Also, since water has high specific heat than milk. Milk will reach its freezing point much quicker.

MELTING THEM IN SUNSHINE:

• Milk melts faster than water.
• This is because milk is a mixture of fat, water, protein and other impurities the chemical bonding is not as strong as water in which molecules are bond tightly together in a regular pattern
• Hence, Milk melts faster than water

BOILING WATER AND MILK :

• Water starts boiling faster than milk.
• The boiling point of water is 100°C, the boiling point of milk is slightly higher than that of water
• Boiling point of milk is higher because of boiling point elevation
• Since milk is a mixture of non volatile solutes which causes it's boiling point to increase.
• On evaporation water leaves no residue.
• On evaporation Milk leaves a super creamy residue. This residue is composed of mainly of milk fat.

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To learn more about boiling and eavaporation refer to the links:

https://brainly.in/question/6563927?utm_source=android&utm_medium=share&utm_campaign=question

https://brainly.in/textbook-solutions/b-lakhmir-singh-manjit-kaur-chemistry-9-9789352837908?utm_source=textbooks&utm_medium=app&utm_campaign=sharing

Answer 2

Answer:

The frozen milk will melt faster as the milk is content with chemical compounds which will melt the milk faster than the water.

Explanation:

As the density of frozen milk is greater than that of frozen water.

The milk is made up of fat products which help it to melt fast.

On evaporation of water, there will be no component left but while evaporating the milk there will be a creamy jelly-like substance present in the milk.

Other than milk if we take into consideration any substance which has greater density than water, it will melt first.

Hence milk will melt fast.

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