UNDERSTANDING SPECIFIC LATENT HEAT

*  CHANGES IN THE STATE OF MATTER CAN BE EXPLAINED BY USING HEATING CURVE AND COOLING CURVE

* HEATING CURVE :
SOLID TO LIQUID TO GAS

* COOLING CURVE :
GAS TO LIQUID TO SOLID

*  SPECIFIC LATENT HEAT :

- AMOUNT OF HEAT ENERGY REQUIRED TO CHANGE THE STATE OF 1 KG OF SUBSTANCE AT CONSTANT TEMPERATURE

- FORMULA :

HEAT ENERGY INVOLVED / MASS OF SUBSTANCE

- UNIT :

* SPECIFIC LATENT HEAT OF FUSION :

- AMOUNT OF HEAT ENERGY REQUIRED BY COMPLETELY CHANGE 1 KG OF A LIQUID TO THE GASEOUS STATE WITHOUT CHANGES IN TEMPERATURE

- SOLID TO LIQUID | LIQUID TO SOLID

* SPECIFIC LATENT HEAT OF VAPORISATION :

- AMOUNT OF HEAT ENERGY REQUIRED TO COMPLETELY CHANGE 1 KG OF A LIQUID TO THE GASEOUS STATE WITHOUT CHANGE IN TEMPERATURE

- LIQUID TO GAS | GAS TO LIQUID

* APPLICATIONS :

- STEAMING FOOD ( THE CONDENSED WATER VAPOUR RELEASES A LARGE AMOUNT OF LATENT HEAT WHEN THE FOOD IS STEAMED )

- PRESERVATION OF FOOD ( PRESERVED BY ICE TO MAINTAIN FRESH FOR A LONGER PERIOD )

- KILLING OF BACTERIA AND GERMS