Different Scale of Temperature
1. Celsius Scale In this scale of temperature, the melting point ice is taken as 0 ° C and the boiling point of water as 100 ° C and space between these two points is divided into 100 equal parts
2. Fahrenheit Scale In this scale of temperature, the melt point of ice is taken as 32 ° F and the boiling point of water as 211 and the space between these two points is divided into 180 equal parts.
3. Kelvin Scale In this scale of temperature, the melting pouxl ice is taken as 273 K and the boiling point of water as 373 K the space between these two points is divided into 100 equal pss
Relation between Different Scales of Temperatures
Thermometric Property
The property of an object which changes with temperature, is call thermometric property. Different thermometric properties thermometers have been given below
( i) Pressure of a Gas at Constant Volume
where p, p100. and pt, are pressure of a gas at constant volume 0 ° C, 100 ° C and t ° C.
A constant volume gas thermometer can measure tempera from – 200 ° C to 500 ° C.
( ii) Electrical Resistance of Metals
Rt = R0( 1 + αt + βt 2)
where α and β are constants for a metal.