• Internal energy is defined as the energy associated with the random, disordered motion of molecules

^ temerature = ^ kinetic component of internal energy.

• Vibration of particles/ movement of particles


• ^ temperature = more vigorous the vibration of particles.
  

Potential energy

• stretching and compressing of intermolecular bonds as particles vibrate.


• amount of potential energy stored in the bonds depends on the force between both of them and their distance.

Melting and sodification

solidification and melting are two opposite methods!

solidification:

• reverse process of melting!
• changing a liquid to solid WITHOUT CHANGE IN TEMPERATURE


• temperature remains at constant at freezing point. -thermal energy is released-

Melting:

• change of solid to liquid WITHOUT CHANGE IN TEMPERATURE
  
• temperature remains constant at melting point -thermal energy is absorbed-
  

• A PURE liquid is heated and changes vapour at a constant temperature.
  
• during boiling, temperature is constant at its boiling point.
  
• Thermal energy is absorbed by the substance.
  

• change of state from vapour to liquid when substance is cooled at a constant temperature
  
• during condensation, the temperature remains constant at the condensation point.
  
• thermal energy is released.

• due to MOLECULES at the surface with energy greater than the average kinetic energy escaping from the remaining liquid.

1. occurs at fixed temperatures.
2. Quick process
3. Takes place throughout the liquid.
4. Bubbles are formed in the liquid.
5. Temperature remains constant
6. Thermal energy supplied by energy source

Evaporation

1. Occurs at any temperature.
2. Slow process
3. Takes place only at the liquid surface
4. No bubbles are formed in the liquid.
5. Temperature may change.
6. Thermal energy supplied by surroundings

1. Temperature
2. Humidity of surrounding air
3. Surface area of the liquid
4. Movement of air
5. Pressure
6. Boiling point of the liquid

Check the video out! =)

~~~~~~~~~~~~~~~~~~~~~~~~THE END~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Internal energy is defined as the energy associated with the random, disordered motion of molecules

^ temerature = ^ kinetic component of internal energy.

• Vibration of particles/ movement of particles


• ^ temperature = more vigorous the vibration of particles.
  

Potential energy

• stretching and compressing of intermolecular bonds as particles vibrate.


• amount of potential energy stored in the bonds depends on the force between both of them and their distance.

Melting and sodification

solidification and melting are two opposite methods!

solidification:

• reverse process of melting!
• changing a liquid to solid WITHOUT CHANGE IN TEMPERATURE


• temperature remains at constant at freezing point. -thermal energy is released-

Melting:

• change of solid to liquid WITHOUT CHANGE IN TEMPERATURE
  
• temperature remains constant at melting point -thermal energy is absorbed-
  

• A PURE liquid is heated and changes vapour at a constant temperature.
  
• during boiling, temperature is constant at its boiling point.
  
• Thermal energy is absorbed by the substance.
  

• change of state from vapour to liquid when substance is cooled at a constant temperature
  
• during condensation, the temperature remains constant at the condensation point.
  
• thermal energy is released.

• due to MOLECULES at the surface with energy greater than the average kinetic energy escaping from the remaining liquid.

1. occurs at fixed temperatures.
2. Quick process
3. Takes place throughout the liquid.
4. Bubbles are formed in the liquid.
5. Temperature remains constant
6. Thermal energy supplied by energy source

Evaporation

1. Occurs at any temperature.
2. Slow process
3. Takes place only at the liquid surface
4. No bubbles are formed in the liquid.
5. Temperature may change.
6. Thermal energy supplied by surroundings

1. Temperature
2. Humidity of surrounding air
3. Surface area of the liquid
4. Movement of air
5. Pressure
6. Boiling point of the liquid

Check the video out! =)

~~~~~~~~~~~~~~~~~~~~~~~~THE END~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~