CHEM 1120 Edition 1nd Lecture 25 Outline of Last Lecture I 5 d orbitals Octahedrals a Magnitude of d orbital splitting b Spectrochemical series c Crystal Field theory d Magnetism II D orbitals in tetrahedral fields III D orbital electronic configurations give rise to color Outline of Current Lecture I Color II Begin Chapter 19 Chemical Thermodynamics a Entropy III Spontaneity and Reversibility Current Lecture I II III Color a Absorb in range of one wavelength color you see complementary color b Energy hc wavelength c Ligands change and thus color d In colorless solutions d orbital completely filled Begin Chapter 19 Chemical Thermodynamics a Will the reaction yield a significant quantity of products Chap 15 b Will the reaction proceed at a reasonable rate Chap 14 c What is entropy i 1st law of thermodynamics focuses on energy ii 2nd and 3rd laws of thermodynamics focus on entropy Spontaneity and Reversibility a Is it more natural to break an egg or put an egg back together Break an egg i Why Entropy situations favor disorganization b Spontaneous process a chemical or physical change that is thermodynamically favored by nature ex downhill spontaneous uphill nonspontaneous i If neither equations are spontaneous you are in equilibrium ii Does not have to proceed at an observable rate doesn t have to be fast iii Spontaneity thermodynamics reaction rate chemical kinetics These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute iv Can be temperature dependent i e melting and freezing ice c Reversibility a process that can be reversed by an infinitesimal change in a variable i Reversing the process returns both the system and the surroundings to their original state
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