CHEM 1032 Chapter Notes - Chapter 17: Spontaneous Process, Phase Transition, Molecular Solid
9 Mar 2016
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A spontaneous process is one that occurs without ongoing outside intervention. A non-spontaneous process can be made spontaneous by coupling it to another process that is spontaneous or by supplying energy from an external source. 17. 3 entropy and the second law of thermodynamics: Most spontaneous reactions are exothermic, some spontaneous reactions are endothermic. Melting of ice, evap of liquid water to gas, water the dissolution of sodium chloride in water. In all 3 processes a quantity called entropy related to disorder or randomness at the molecular level increase. We can think of entropy as disorder or randomness. Entropy (s) is a thermodynamic function that increases with the number of energetically equivalent ways to arrange the compounds of a system to achieve a particular state. (pvt) define the macro state or the state of the system. As long as these conditions remain constant the energy of the system also remains constant.
