27) Select the best set of reagents to accomplish the following transformation. OH ? a) i) H2CrO4; ii) CH3CH2CH2OH, H*, heat b) i) PCC/CH2Cl2; ii) CH3CH2CH2MgBr; iii) H3O+ c) i) H₂CrO4; ii) SOCl2, heat; iii) (CH3CH2CH2)2CuLi d) i) PCC/CH2Cl2; ii) CH3CH2CH=PPh3 28) Select the major product of the following series of reactions. ستم OCH3 .OH ☑ 1) DIBALH, -78 °C 2) H₂O 3) CH3CH2MgBr 4) H3O+ OH 29) Select the major product of the following reaction. བྱིན ཀྱང ཡིན མིག OH H₁C CH₁ ? b) ? CH

27) Select the best set of reagents to accomplish the following transformation. OH ? a) i) H2CrO4; ii) CH3CH2CH2OH, H*, heat b) i) PCC/CH2Cl2; ii) CH3CH2CH2MgBr; iii) H3O+ c) i) H₂CrO4; ii) SOCl2, heat; iii) (CH3CH2CH2)2CuLi d) i) PCC/CH2Cl2; ii) CH3CH2CH=PPh3 28) Select the major product of the following series of reactions. ستم OCH3 .OH ☑ 1) DIBALH, -78 °C 2) H₂O 3) CH3CH2MgBr 4) H3O+ OH 29) Select the major product of the following reaction. བྱིན ཀྱང ཡིན མིག OH H₁C CH₁ ? b) ? CH

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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3. Application of AG to fuel cells We often associate AG with the idea of equilibrium. We will explore this relation in the next lectures. In this problem, let us briefly explore another interpretation of AG, i.e. how it relates to non-PV work. Suppose you are constructing a fuel cell i.e. a device that converts chemical energy into electrical work. Calculate the maximum amount of electrical work that can be extracted on a per mole basis if the fuel cell is run on the combustion of methane at T = 298 K and P = 1 bar. Assume that the products of combustion, i.e. reaction with oxygen gas, are carbon dioxide gas and liquid water. Note the following values: AH°c(CH4(g)) = -891 kJ mol-¹ and S°(CO₂(g)) = 213.8 J mol-¹ K-¹, S°(H₂O(1)) = 70.0 J mol¹ K-¹, S°(CH₂(g)) = 186.3J mol-¹ K-¹, and S°(O₂(g)) = 205.2 J mol-¹ K-¹.
A student made measurements on some electrochemical cells and calculated three quantities: • The standard reaction free energy AGº. • The equilibrium constant K at 25.0 °C. me 1. ? • The cell potential under standard conditions E°. 00 2. His results are listed below. Ex Unfortunately, the student may have made some mistakes. Examine his results carefully and tick the box next to the incorrect quantity in each row, if any. 000 Note: If there is a mistake in a row, only one of the three quantities listed is wrong. Also, you may assume the number of significant digits in each quantity is correct. Also note: for each cell, the number n of electrons transferred per redox reaction is 2. 10 Ar cell n calculated quantities (Check the box next to any that are wrong.) K 0 E 27 A 2 156. kJ/mol O 2.14 X 10 0.81 V 11 B 2 66. kJ/mol O 3.65 × 10 -0.34 V C 2 -264. kJ/mol 46 1.78 x 10 -1.37 V K So Na G 4. 3.