Chapter 4: (3) Specific Latent Heat Flashcards
What is specific latent heat, l?
The heat energy required to change phase of 1kg object at a constant temperature.
What is specific latent heat of fusion, lf?
The heat energy required to change 1kg of solid to liquid at a constant temperature
What is specific latent heat of vaporization, lv?
The heat energy required to change 1kg of liquid to gas at constant temperature
During heating, why is the temperature increase?
Energy absorbed used to increase the average kinetic energy of molecules.
During heating, why is the temperature constant?
Energy absorbed is used to overcome the forces of attraction between molecules. Average kinetic energy of molecules does not change.
During cooling, why is the temperature cooling?
Energy released decreases the average kinetic energy of molecules.
During cooling, why is the temperature constant?
Latent heat released to the surrounding, forces of attraction between molecules become stronger. Average kinetic energy of molecules does not change.
