Chapter 17 notes

Chapter 17 notes - Chapter 17 Objectives(Thermodynamics 1...

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Chapter 17 Objectives (Thermodynamics) Spring 2084/Chem 0970 1. Introduction. a) The thermodynamic functions in this unit enable us to do several important things with data already tabulated in the chemical literature. 1. Deciding if the reaction C 2 H 4(g) + CH 4(g) C 3 H 8(g) and, in fact, any reaction is feasible? 2. Calculating the equilibrium constant for this reaction or any reaction. 3. Deciding how much work is actually available from a given chemical reaction. b) In addition to chemical reactions (and physical changes) tending to move from a higher energy state to a lower energy (more stable) state, there is the tendency for chemical reactions (and physical changes) to progress from a more ordered state to a less ordered state. 2. Entropy: a measure of disorder. a) Consider a mole of water at its boiling point. H 2 O ( ) H 2 O (g) R H = ) g ( O 2 H F H - ) ( O 2 H F H = -241.8 – (-285.8) = 44 kJ b) At equilibrium, the disorder of a system is measured in terms of its entropy. S
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This note was uploaded on 04/07/2008 for the course CHEM 0970 taught by Professor Kogut during the Spring '08 term at Pittsburgh.

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Chapter 17 notes - Chapter 17 Objectives(Thermodynamics 1...

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