Why is water used to caliberate a thermometer why is the temperature of an ice bath and a boiling point chosen for the calibration of a thermometer
Why is water used to caliberate a thermometer
why is the temperature of an ice bath and a boiling point chosen for the calibration of a thermometer
To assign a value to a particular temperature, thermometers are calibrated. Hence, we need to take two conventional temperature points which are always fixed at the standard pressure. Our standard pressure is atmospheric pressure (1 atm) and at this pressure, the physical change for ice to water is fixed at 0 oC and change for water to steam is fixed at 100 oC. Hence, these two are fixed conventional temperature points. therefore water is taken to calibrate the temperature. It assigns two fixed points on thermometer scale 0 oC and 100 oC and thermometer is divided into hundred equal markings with each marking representing a change of 1 oC with change in temperature.
In Fahrenheit, these fixed conventional temperature are 32 oF (freezing point) and 212 oF (boiling point with 180 equal markings
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