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The standard fixed point of thermometry is
- a)Ice point
- b)Sulphur point
- c)Triple point of water
- d)Normal boiling point of water
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The standard fixed point of thermometry isa)Ice pointb)Sulphur pointc)...
The triple point of water has a unique value of 273.16 K. At particular value of volume and pressure the triple point of water is always 273.16 K. The melting point of ice and boiling point of water do not have particular values because these points depend on pressure and temperature
Most Upvoted Answer
The standard fixed point of thermometry isa)Ice pointb)Sulphur pointc)...
Triple point of water is unique i.e. it occurs only at particular set of pressure and temperature unlike icing and boiling which depend on atmospheric conditions.
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Community Answer
The standard fixed point of thermometry isa)Ice pointb)Sulphur pointc)...
Triple Point of Water:
The standard fixed point of thermometry is the triple point of water.
Explanation:
The triple point of water is a unique combination of temperature and pressure at which water can exist in equilibrium as a solid, liquid, and gas simultaneously. This point occurs at a temperature of 0.01°C and a pressure of 611.657 pascals.
Significance:
- The triple point of water is used as a reference point for calibrating thermometers as it provides a precise and reproducible fixed point for temperature measurement.
- It serves as a fundamental basis for the definition of the Kelvin temperature scale.
- By defining the triple point of water as a standard fixed point, it allows for consistency and accuracy in temperature measurements across different instruments and laboratories.
Comparison with Other Options:
- The ice point and normal boiling point of water are not as precise as the triple point of water for calibrating thermometers due to the variations in atmospheric pressure and impurities in the water.
- The sulphur point is not as commonly used as a fixed point for thermometry compared to the triple point of water.
In conclusion, the triple point of water is the standard fixed point of thermometry due to its unique properties and significance in providing a precise reference point for temperature measurements.
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