constant pressure gas thermometer boiling point

On heating the bulb to a specific temperature, the gas expands and pushes the mercury down to tube A and consequently mercury level at C rises.

The constant – volume gas thermometer depends on the variation in the pressure of a gas at constant volume with changes in the temperature of the gas. List four advantages of mercury over alcohol as a thermometric thermometer.State three desirable properties of a thermometric liquid.The lower end of Y indicates the minimum temperature. When the temperature falls the alcohol contracts and moves in anticlockwise direction, the mercury pushes steel index Y up. The maximum temperature is read from the lower end of x. When the temperature rises, since alcohol expands more than mercury, The alcohol expands and flows in clockwise direction and the mercury pushes steel index x upwards. It contains alcohol at two upper part of the bent tube and mercury below.

(iii) The Maximum and minimum thermometer is used to measure the maximum and minimum temperatures of the day. These data agree with the Acoustic Thermometry data in suggesting that the boiling point of helium (T 58) is low on the Kelvin Thermodynamic scale by as much as 8 (+/- 3) millideg.(ii) The school thermometer is used in school laboratory, it ranges from 0 0C – 100 0C. In general, the NSL CVGT and the NBS-Acoustic scales are in agreement within their combined experimental error (+/- 5 millideg.) if a slight shift (+ 0.015%) is made in the NBS Platinum Resistance Thermometer Scale (1955) on which the CVGT data are based. A complete description is given of the CVGT and the data which were obtained with it, as well as a discussion of comparisons which were made between the CVGT scale and the NBS-Acoustic, liquid helium vapor pressure (T 58), and NBS Platinum Resistance Thermometer (1955) scales. One of these thermometers subsequently was calibrated against the NBS Acoustic Thermometer Scale. in the temperature range from 2 to 16 K using the NBS Platinum Resistance Thermometer Scale (1955) for reference temperatures. A constant volume gas thermometer (CVGT), which was constructed at the National Standards Laboratory, Australia, has been used to determine the resistance vs temperature relationships for a number of germanium thermometers to a accuracy of +/- 3 millideg.

Constant pressure gas thermometer boiling point