Q.10. While conducting the experiment to determine the melting point of ice, students that the thermometer reading decreased for sometime and then become constant. What could be the possible reason for this? Explain briefly.

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Solution

The solution is as follows:

The temperature becomes constant because the entire heat is used up in conversion from solid to liquid state of water. This point is known as melting point of water. The heat used in fusion of ice to water is latent heat of fusion.

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In an experiment to determine the melting point of an ice in laboratory what form of I should be preferable reused when should be the reading of the thermometer be noted

Q. A student sets up an apparatus to determine the melting point of ice. He takes a beaker half filled with crushed ice and dips a mercury thermometer with an initial reading of room temperature (25ºC) in such a way that the bulb of the thermometer is surrounded by ice. The correct observation obtained by the student is that :
(1) Mercury in the thermometer keeps on falling till it reads, −1ºC and becomes constant thereafter
(2) temperature falls, reaches 0ºC, then it remains constant even after the whole of the ice has melted
(3) the temperature falls in the beginning but starts rising as soon as the ice starts melting
(4) temperature falls, reaches 0ºC and remains constant only as long as both ice and water are present in it

Q. When ice is heated, the thermometer reading remains constant as the melting point is reached.

Q. A thermometer has wrong calibrations. It reads melting point of ice as

- 10^{o} C

and reads

60^{o} C

at temperature of

50^{o} C

. Temperature of boiling point noted by this thermometer will be (All temperature are note d atmospheric pressure)

Q. A thermometer has wrong calibration. It reads the melting point of ice as

- 10^{\circ}

. If it reads

60^{\circ}

in place of

50^{\circ} C

, what is the temperature of the boiling point of water on this scale.

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Q.10. While conducting the experiment to determine the melting point of ice, students that the thermometer reading decreased for sometime and then become constant. What could be the possible reason for this? Explain briefly.

The solution is as follows: The temperature becomes constant because the entire heat is used up in conversion from solid to liquid state of water. This point is known as melting point of water. The heat used in fusion of ice to water is latent heat of fusion.

The solution is as follows:

The temperature becomes constant because the entire heat is used up in conversion from solid to liquid state of water. This point is known as melting point of water. The heat used in fusion of ice to water is latent heat of fusion.