11. Suppose an obligate aerobic chemolithotroph was able to use any of the potential energy sources listed in the table below as asource of electrons. Which energy source (i.e., electron donor: I want the molecule not the redox couple) would provide thegreatest amount of free energy? (Note: all the redox couples listed are two electron transfers). Explain your answer – MATHworks well for this.Redox CouplePo-0.422H H2+0.42NO, NO,%0H0+0.82s'H,Sso, s0,"-0.282-2-+0.0212. Consider a redox reaction involving the redox couples S/H2S and NO3/NO, in the above table.(a) Which molecule (I want the molecule, not the redox couple) would be the electron acceptor? Why? Use the table above tohelp answer this question.(b) (Suppose a chemoorganotroph could acquire electrons from H2 using either oxygen or nitrate (NO3) as the terminalelectron acceptor. Per two electrons transferred, determine if the use of nitrate or oxygen will yield more energy? You mustshow how you arrived at this by showing your work in order to receive full credit for your answer. It's all in the math!Option (A): H2 +½ O2 = H2OOption (B): H2 + NO3¯=NO2¯ +H2O

The relation between standard potential and free energy is shown below. ∆G∘=-nFE∘

11. Suppose an obligate aerobic chemolithotroph was able to use any of the potential energy sources listed in the table below as a source of electrons. Which energy source (i.e., electron donor: I want the molecule not the redox couple) would provide the greatest amount of free energy? (Note: all the redox couples listed are two electron transfers). Explain your answer – MATH works well for this. Redox Couple 2H H, -0.42 +0.42 NO, NO, +0.82 s'ms -0.28 S'H,S 2- +0.02 6.

11. Suppose an obligate aerobic chemolithotroph was able to use any of the potential energy sources listed in the table below as a source of electrons. Which energy source (i.e., electron donor: I want the molecule not the redox couple) would provide the greatest amount of free energy? (Note: all the redox couples listed are two electron transfers). Explain your answer – MATH works well for this. Redox Couple 2H H, -0.42 +0.42 NO, NO, +0.82 s'ms -0.28 S'H,S 2- +0.02 6.

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter9: Energy And Chemistry

Section: Chapter Questions

Problem 9.72PAE: 9.72 Although it can be a nuisance when a laptop computer freezes up and needs to be rebooted, we...

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Two students prepared aqueous solutions of LiCl and measured the properties, as shown in the table above. Both students observed that the solid LiCl readily dissolved in H2O. The students drew particle diagrams to explain the changes in the enthalpy and entropy of dissolution for LiCl based on their results and observations. Based on this information, the better particle diagram was drawn by which student, and why is that diagram more accurate? (see attached image) a.) The better particle diagram was drawn by Student 1 because when LiCl dissolves in water, it dissociates into Li+ and Cl− ions causing an increase in entropy. b.) The better particle diagram was drawn by Student 1 because when LiCl dissolves in water, it dissociates into Li+and Cl−ions indicating that the dissolution of LiCl is exothermic. c.) The better particle diagram was drawn by Student 2 because it shows that LiCl does not dissociate, resulting in a decrease in entropy for the dissolution of LiCl.…
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