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प्रश्न
Molecules of a substance are always in a state of............ and so they possess .............
उत्तर
Molecules of a substance are always in a state of motion and so they possess kinetic energy.
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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.
Explain the term Melting Point.
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?
Analogy:
Melting: ice into water on heating,
freezing: _______.
Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.
Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion?
______ is the changing of a liquid into its solid state and it happens by cooling.
A puddle of water gets pooled around the glass of ice cream or a glass of ice cubes. When it is kept at room temperature. Give reason.
