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Describe an activity of determine the boiling point of water and melting point of ice.

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To determine the boiling point of water:

Activity: 

i. Take small amount of water in a beaker and suspend a thermometer so that its bulb (lower part) is in contact with the ice. 

ii. Put a glass rod in the beaker and start heating the beaker till the water starts boiling. 

iii. Note the temperature when the water converts into gaseous state.

Conclusion: The temperature at which the water starts boiling at the atmospheric pressure is called boiling point of water.

To determine the melting point of ice: 

Activity: 

i. Take about 150 g in beaker and suspend a thermometer so that its bulb (lower part) is in contact with the ice. 

ii. Start heating the beaker at a very low lame. 

iii. Note the temperature when the ice starts melting.

Conclusion: The temperature at which the ice starts melting into liquid state is called melting point of ice.

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