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Question
The boiling point of water is defined as ______.
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Solution
The boiling point of water is defined as the constant temperature at which water changes to steam.
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RELATED QUESTIONS
Describe an experiment to demonstrate that water absorbs heat during boiling at a constant temperature.
A certain quantity of water is heated from 20°C to 100°C. Its temperature is recorded after each 1 minute. The observations are:
| Time (in minute) | Temperature (in °C) |
| 0 | 20 |
| 1 | 30 |
| 2 | 40 |
| 3 | 50 |
| 4 | 60 |
| 5 | 70 |
| 6 | 80 |
| 7 | 90 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
A pressure cooker is based on the principle that boiling point of water increases with the ______.
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____________ is the change of solid state directly to vapour state without going through the ____________ state.
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Assertion (A): No-new substance is formed when water is heated to get steam.
Reason (R): Conversion of water into steam is a physical change.
