CHM 121 Lecture Notes - Lecture 8: Radiant Energy, Thermal Energy, Chemical Energy
18 Dec 2016
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Document Summary
Energy is the capacity to do work: kinetic energy is the energy due to motion. Thermal energy is associated with temperature: potential energy is due to the position or composition. Thermochemistry is the study of heat change in chemical reactions: the system is the specific part of the universe that is of interest in the study, the surroundings is everything other than the system around it. Units of energy: the amount of kinetic energy an object has is directly proportional to its mass and velocity. State functions are properties that are determined by the state of the system, regardless of how that condition was achieved. The magnitude of the change depends only on the intial and finals states of the system. If the burning of the fuel in a potato cannon performs 855 j of work on the potato and produces 1422 j of heat, what is de for the burning of the fuel: heat exchange.
