Gas thermometers are more sensitive than mercury thermometers. Wh… - Vidyadip

Question

Gas thermometers are more sensitive than mercury thermometers. Why?

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Answer

The coefficient of increase of pressure (or volume) of a gas is $\frac{1}{273.15}^\circ\text{C}^{-1}$ It is very large as compared to 273.15 coefficient of expansion of mercury. Therefore, for a certain increase in temperature, increase in volume of the gas will be large compared to that of mercury and hence a gas thermometer is more sensitive.

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