CHM 1046 Lecture Notes - Lecture 1: Spontaneous Process, Sodium Chloride, Methanol
Document Summary
Unit 1 spontaneous processes, entropy, and changes in entropy. Spontaneous process process, either chemical or physical, that occurs without continued external influence. In other words, work or energy are not required to make them happen. Non-spontaneous processes processes that occur only with external influences. In other words, work or energy is required for them to happen. Spontaneity is not related to the speed of reactions, which means that reactions can occur fast or slow, independently of being spontaneous. Examples of reactions and their classification as spontaneous or non-spontaneous: iron rusting 4fe (s) + 3o2 (g) + 6h2o (l) 4fe(oh)3 (s) The spontaneity of this reaction depends on the temperature: water freezing at -10 c. This reaction is spontaneous because water is naturally frozen -10 c, so energy is not required to make it happen: water freezing at +10 c. This reaction is not spontaneous because water is liquid at 10 c, so energy is required to make this process happen.
