CH110 Chapter Notes - Chapter 6: Thermal Energy, Heat Capacity, Thermite
Document Summary
Thermite reaction aluminium reduces the oxide of another metal, most commonly iron oxide, creating a short burst of extremely high temperature: The reaction is used for thermite welding, often used to join rail tracks. Open system can exchange both matter and energy with its surroundings. No control of heat; don"t use in thermochemistry a lot. Closed system can exchange energy but not matter with its surroundings. Isolated system exchanges neither matter nor energy with its surroundings. To be in perfect isolation, the system needs to be a vacuum. E. g. , a thermos (although it"s not perfect isolated) Surroundings the portion of the universe with which a system interacts. Energy the capacity to do work. Heat (q) the flow of energy caused by a temperature difference. Heat passes from a warmer body (higher t) to a colder body (lower t) until the average kinetic energies of the two bodies are equal (they have the same t)
