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Unformatted text preview: “roach motel” for vapors perhaps – that traps any vapor molecule that happens randomly to diffuse in, that would remove the odor without violating the 2 law. We would be using an nd enthalpy term – some enthalpy of binding of an odor molecule to the walls of the trap – to overcome the tendency of the molecules to become increasinngly diffuse. This would be an example of the ) H term in ) G overcoming the T ) S term.) b) Worked in class. ) S = q/T 2.2 a) Entropy change is S(reactants) - S(products) = 2(240) + 2(70) - 121 - 3(205) b) If the hydrazine was a gas, its entropy of formation would be significantly higher (several hundred J/K.mol – compare O2, NO2) so the net increase in entropy would be less....
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This note was uploaded on 07/16/2008 for the course MAE 101 taught by Professor Lee during the Spring '08 term at ASU.
- Spring '08