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

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 flame.

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.