Energy

  • It is a quantity that can be stored with the system and can be exchanged between the system and surroundings.
  • The exchange of energy occurs either as heat or as work.
  • Types of energy: Potential energy, kinetic energy, internal energy, etc.
  • Kinetic and potential energy are not thermodynamic properties of the system, as they do not change with temperature or pressure of the body. Internal energy is a thermodynamic property of the system