CHE 132 Lecture Notes - Lecture 2: Thermodynamics, Exothermic Process
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CHE 132 Full Course Notes
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Document Summary
States that there is a conservation of energy; the internal energy of a system is the sum of the kinetic and potential energy. This internal energy changes when heat (q) or work (w) is released or absorbed. Whatever that isn"t part of the system is part of the surrounding. The change in energy by the system is the change in energy by the surrounding. The system + the surrounding = the universe [the total energy of the universe is constant, therefore the change in energy of the universe is constant] The first law of thermodynamics account for the energy, not the direction of a process; Enthalpy change is the heat gained or lost at constant pressure. However, it does not determine spontaneity as well. Exothermic reactions do not mean that a process will be spontaneous. Endothermic reactions also do not mean that a process will be spontaneous. Freedom of particle motion and dispersal of kinetic energy.