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===Learning objectives===
===Learning objectives===
* The capacity to hold Heat is different for different substances.This capacity of a substance to hold heat is expressed by a quantity called Thermal capacity/Heat capacity. Due to this property, either adding or removing heat from a substance can change its physical state.
* The capacity to hold Heat is different for different substances.This capacity of a substance to hold heat is expressed by a quantity called Thermal capacity/Heat capacity. Due to this property, either adding or removing heat from a substance can change its physical state.
+* When a substance changes its physical state, there will be no change in the structure of its molecules.The nature of the molecules of a substance will be same irrespective of its physical state.When a change of state occurs, then there will be a change in the attraction between the molecule distance and kinetic energy of the molecules will change.
#Defines heat capacity and specific heat.
#Defines heat capacity and specific heat.