NEET-XII-Physics
23: Heat and Temperature
- #2A constant-volume thermometer registers a pressure of 1.500 × 104 Pa at the triple point of water and a pressure of 2.050 × 104 Pa at the normal boiling point. What is the temperature at the normal boiling point?Ans : Given:
Pressure registered by a constant-volume thermometer at the triple point, Ptr = 1.500 × 104 Pa
Pressure registered by the thermometer at the normal boiling point, P = 2.050 × 104 Pa
We know that for a constant-volume gas thermometer, temperature (T) at the normal boiling point is given as:
`` T=\frac{P}{{P}_{tr}}\times 273.16\,\mathrm{\,K\,}``
`` \Rightarrow T=\frac{2.050\times {10}^{4}}{1.500\times {10}^{4}}\times 273.16\,\mathrm{\,K\,}``
`` \Rightarrow T=373.31\,\mathrm{\,K\,}``
Therefore, the temperature at the normal point (T) is 373.31 K.
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