Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN: 9780618974122
Author: Andrei Straumanis
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 21E
Is bond formation endothermic or exothermic? Write a
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Use the bond energies to determine whether the following reaction is exothermic or endothermic and what is the amount of energy released or absorbed?
H-O – O-H + H-O – O-H ---> O=O + H – O –H + H –O – H, hydrogen peroxide reacts to form oxygen gas and water.
Bonds to Break: Bonds to Form:
Chapter 4 Solutions
Organic Chemistry: A Guided Inquiry
Ch. 4 - Prob. 1CTQCh. 4 - Figure 4.1 is a cartoon depiction of liquid water...Ch. 4 - Prob. 3CTQCh. 4 - Prob. 4CTQCh. 4 - In HF , neither H nor F holds a full formal charge...Ch. 4 - Prob. 6CTQCh. 4 - Prob. 7CTQCh. 4 - Prob. 8CTQCh. 4 - Within any one section of Table 4.2, boiling...Ch. 4 - Prob. 10CTQ
Ch. 4 - Prob. 11CTQCh. 4 - Prob. 12CTQCh. 4 - Prob. 13CTQCh. 4 - Prob. 14CTQCh. 4 - Prob. 15CTQCh. 4 - Prob. 16CTQCh. 4 - Prob. 17CTQCh. 4 - Prob. 18CTQCh. 4 - Prob. 19CTQCh. 4 - Prob. 20CTQCh. 4 - Prob. 21CTQCh. 4 - Prob. 22CTQCh. 4 - (E) Label each of the following as strong acid,...Ch. 4 - Prob. 24CTQCh. 4 - Draw the structure of the conjugate base of water....Ch. 4 - Does Cl have a conjugate acid? If so, what is it?...Ch. 4 - Draw the conjugate base of CH4 (methane).Ch. 4 - For the previous four questions, label each...Ch. 4 - Prob. 29CTQCh. 4 - According to the conventions above, what is the...Ch. 4 - Draw an arrow on Figure 4.13 representing Hrxn4 ....Ch. 4 - Prob. 32CTQCh. 4 - Add a + or above each curved arrow in Figure 4.11...Ch. 4 - Prob. 34CTQCh. 4 - Prob. 35CTQCh. 4 - Prob. 36CTQCh. 4 - Prob. 37CTQCh. 4 - Prob. 38CTQCh. 4 - Prob. 39CTQCh. 4 - Prob. 40CTQCh. 4 - Prob. 41CTQCh. 4 - Prob. 42CTQCh. 4 - Prob. 43CTQCh. 4 - Prob. 44CTQCh. 4 - Prob. 45CTQCh. 4 - Prob. 46CTQCh. 4 - For NH3 (ammonia) and H2O (water)... a. Use curved...Ch. 4 - Prob. 48CTQCh. 4 - Prob. 49CTQCh. 4 - Prob. 50CTQCh. 4 - Prob. 51CTQCh. 4 - Prob. 52CTQCh. 4 - Prob. 53CTQCh. 4 - Prob. 1ECh. 4 - Prob. 2ECh. 4 - Prob. 3ECh. 4 - Prob. 4ECh. 4 - Prob. 5ECh. 4 - Prob. 6ECh. 4 - Prob. 7ECh. 4 - Prob. 8ECh. 4 - Propanal (bp 48°C) and propanol (bp 97°C), both...Ch. 4 - Rank the following molecules from lowest to...Ch. 4 - Prob. 12ECh. 4 - For each molecule below, draw the conjugate acid...Ch. 4 - For each structure you drew in the answer to the...Ch. 4 - Mark each of the following statements True or...Ch. 4 - Organic chemistry is a bit like cooking. Later in...Ch. 4 - Prob. 17ECh. 4 - Prob. 18ECh. 4 - Are endothermic reactions favorable or...Ch. 4 - Prob. 20ECh. 4 - Is bond formation endothermic or exothermic? Write...Ch. 4 - Summarize the relationship between pKa and acid...Ch. 4 - Summarize the relationship between pKa and base...Ch. 4 - Prob. 25ECh. 4 - Consider the following bases: a. For each base...Ch. 4 - Prob. 27ECh. 4 - The following are equivalent ways of asking about...Ch. 4 - Prob. 29E
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- Aspirin is made from salicylic acid, which has this Lewis structure: (a) Which is the longest carbon-carbon bond? (b) Which is the strongest carbon-oxygen bond? (c) Draw resonance structures for this molecule.arrow_forwardMethylcyanoacrylate is the active ingredient in super glues. Its Lewis structure is In this molecule, which is the (a) weakest carbon-containing bond? (b) strongest carbon-containing bond? (c) most polar bond?arrow_forwardWrite all resonance structures of chlorobenzene, C6H5Cl, a molecule with the same cyclic structure as benzene. In all structures, keep the CCl bond as a single bond. Which resonance structures are the most important?arrow_forward
- When a reaction is exothermic, is the sum of bond energies of products or of reactants greater?arrow_forwardIn the Lewis structure for chloromethane, the chlorine atom is sharing _____ electron pair and “owns” _____ of those electrons. Also, the chlorine atom possesses two electrons from each of _____ unshared pairs. The total number of electrons that belong to chlorine is 7 . Chlorine is a Group ____ element. The formal charge on chlorine in chloromethane is ____.arrow_forwardThink of forming an ionic compound as three steps (this is a simplification, as with all models): (I) removing an electron from the metal; (2) adding an electron to the nonmetal; and (3) allowing the metal cation and nonmetal anion to come together. a. What is the sign of the energy change for each of these three processes? b. In general, what is the sign of the sum of the first two processes? Use examples to support your answer. c. What must be the sign of the sum of the three process d. Given your answer to part c, why do ionic bonds occur? e. Given your above explanations, why is NaCl stable but not Na2Cl? NaCl2? What about MgO compared to MgO2? Mg2O?arrow_forward
- Bond Enthalpy When atoms of the hypothetical element X are placed together, they rapidly undergo reaction to form the X2 molecule: X(g)+X(g)X2(g) a Would you predict that this reaction is exothermic or endothermic? Explain. b Is the bond enthalpy of X2 a positive or a negative quantity? Why? c Suppose H for the reaction is 500 kJ/mol. Estimate the bond enthalpy of the X2 molecule. d Another hypothetical molecular compound, Y2(g), has a bond enthalpy of 750 kJ/mol, and the molecular compound XY(g) has a bond enthalpy of 1500 kJ/mol. Using bond enthalpy information, calculate H for the following reaction. X2(g)+Y2(g)2XY(g) e Given the following information, as well as the information previously presented, predict whether or not the hypothetical ionic compound AX is likely to form. In this compound, A forms the A+ cation, and X forms the X anion. Be sure to justify your answer. Reaction: A(g)+12X2(g)AX(s)The first ionization energy of A(g) is 400 kJ/mol. The electron affinity of X(g) is 525 kJ/mol. The lattice energy of AX(s) is 100 kJ/mol. f If you predicted that no ionic compound would form from the reaction in Part e, what minimum amount of AX(s) lattice energy might lead to compound formation?arrow_forwardDistinguish between the terms electronegativity versus electron affinity, covalent bond versus ionic bond, and pure covalent bond versus polar covalent bond. Characterize the types of bonds in terms of electronegativity difference. Energetically, why do ionic and covalcnt bonds form?arrow_forwardFor each of the following, write an equation that corresponds to the energy given. a. lattice energy of NaCl b. lattice energy of NH4Br c. lattice energy of MgS d. O9O double bond energy beginning with O2(g) as a reactantarrow_forward
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