Liquid Thermometres: These thermometers are based on the thermal expansion of liquids. Classification: The classification is depending upon the physical property of the substance that varies with temperature. So t = (X 0-X t/X 100-X 0)100 0C Thermometer: The instrument used to measure the temperature is called is called Thermometre. In this article let X 0, X 100, X t be the parameters at ice point, steam point and unknown temperature, respectively. Note that data could have been collected with three different amounts of the same gas, which would have rendered this experiment easy to do in the eighteenth century.Ĭoncept: A thermometric property like length of a wire, resistance of a metallic and volume of a gas proportional to temperature. To the extent that the gas is ideal, the pressure depends linearly on temperature, and the extrapolation to zero pressure occurs at absolute zero. Consider a graph of pressure versus temperature made not far from standard conditions (well above absolute zero) for three different samples of any ideal gas (a, b, c). The constant volume gas thermometer plays a crucial role in understanding how could be discovered long before the advent of.
Plots of pressure vs temperature for three different gas samples extrapolate to absolute zero. Explanation: The product of pressure and volume of a gas depends strongly on the temperature of.
Constant volume gas thermometer In case of errors.