Heat

Heat is the energy that is transferred from one body to another body as a result of a difference in temperature. 

• Each Molecule consists of particles
• Kinetic Energy – the speed of vibration
• Potential Energy – the separation between the particles
• Internal Energy – the sum of Kinetic Energy and the inter-particle potential energy
• Heat transferred between a hot and a cold body increases the internal energy of the cold body
• Work done on particles increases the potential energy
• Thus the internal energy can change due to work performed or heat transfer
• Internal Energy, heat, and work are all measured in Joules (J)
• Temperature is a measure of the random kinetic energy of a molecule