Thermal and Internal energy

• Internal energy is the energy stored inside a system by the particles
• Internal energy = potential energy + kinetic energy
• Thermal energy is The total energy of an object due to the kinetic energy of its atoms and/or molecules depending on its mass.
• In thermal energy, Every system above absolute zero (-2730c) has a positive thermal energy.
• Temperature is the measures of the average kinetic energy of molecules
• Temperature of an object can take negative, but the thermal

  energy of a system cannot be negative.
• Freezing and condensation are exothermic.
• Melting, boiling and sublimation are endothermic.