THERMAL PROPERTIES OF MATTER
CLASS 11 PHYSICS : CHAPTER 11
Let us start this chapter with the definitions of 'temperature' and 'heat'.
Temperature is a relative measure of the hotness or coldness of a body.
Heat is a form of energy which gets transferred between two systems or between a system and its surroundings by virtue of temperature difference.
Heat is a form of energy which produces in us the sensation of warmth.
Specific Heat: Specific heat of a substance is defined as the amount of heat required to raise the temperature of unit mass of the substance through unit degree.
CGS unit: cal g-1 °C-1
SI unit: J kg-1 K-1
Heat capacity: It is defined as the amount of heat required to raise the temperature of the body through unit degree.
Unit: cal °C-1
Latent heat of fusion: It is defined as the amount of heat required to change the state from solid to liquid per unit mass of the substance.