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प्रश्न
State the melting point of ice.
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उत्तर
MELTING POINT OF ICE: “Is the constant temperature at which it starts (melting) changing from ice to water.”
It is 0°C for ice.
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संबंधित प्रश्न
The temperature at which a solid convert into a liquid is called its .........
Differentiate between melting point ,giving atleast one example of each.
Describe an experiment to demonstrate that a substance absorbs heat during melting without change in its temperature.
Some ice is taken in a beaker and its temperature is recorded after each one minute. The observations are listed below
| Time (in minute) | Temperature (in °C) |
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 3.8 |
| 7 | 7.6 |
| 8 | 11.4 |
From the above observations, what conclusion do you draw about the melting point of ice?
What are the changes of state in water? Explain.
Analogy:
Melting: ice into water on heating,
freezing: _______.
A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0°C). If you could measure the temperature of the content of the tumbler, which of the following graphs (Fig.1.2) would correctly represent the change in its temperature as a function of time.
In an endothermic process, the speed of the molecules is ______ hence they move faster.
A change of state is a change of a substance from ______.
Define latent heat of fusion?
