Chemistry & Chemical Reactivity, Hybrid Edition (with OWLv2 24-Months Printed Access Card)
9th Edition
ISBN: 9781285462530
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Chapter 9, Problem 25PS
Among the following, which has the shortest bond and which has the longest: Li2, B2, C2, N2, O2?
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Students have asked these similar questions
Which has a stronger bond, N2 or O2? Which one of them is longer?
10. Methanol is an important industrial solvent. To produce methanol, carbon monoxide and hydrogen gas are reacted
together:(assume that CO has a triple bond):
CO(g) + 2 H₂(g) → CH3OH(1)
Use bond energies to estimate the enthalpy of this reaction.
Bond
O-H
0-0
0=0
C-C
C=C
C-O
C=O
C=0
C-H
C-Cl
C-F
H-CL
H-F
F-F
H-H
A. 266 kmol
B. -45 kJ/mol
C. -12
J/mol
D. 400 /mol
Average bond
energy (kJ/mol)
467
146
495
347
614
358
745
1072
413
339
485
427
565
154
432
5.
Consider the reaction between hydrazine and hydrogen to produce ammonia, N2H4(g)+H2(g)→2NH3(g)N2H4(g)+H2(g)→2NH3(g). Use enthalpies of formation and bond enthalpies to estimate the enthalpy of the nitrogen-nitrogen bond in N2H4N2H4. (Hint: In an N2H4N2H4 molecule, each NN atom has single bonds to the adjacent NN atom and two HH atoms. In an NH3NH3 molecule, the central NN atom has single bonds to three HH atoms.)
Chapter 9 Solutions
Chemistry & Chemical Reactivity, Hybrid Edition (with OWLv2 24-Months Printed Access Card)
Ch. 9.2 - Use valence bond theory to describe the bonding in...Ch. 9.2 - Identify the hybridization of each underlined atom...Ch. 9.2 - Use valence bond theory to describe the bonding in...Ch. 9.2 - What is the hybridization of the S atom (the...Ch. 9.2 - 2. Which of the following is incorrect?
The...Ch. 9.2 - Prob. 3RCCh. 9.2 - Prob. 4RCCh. 9.3 - What is the electron configuration of the H2+ ion?...Ch. 9.3 - Could the anion Li2 exist? What is the ions bond...Ch. 9.3 - The cations O2+ and N2+ are formed when molecules...
Ch. 9.3 - What is the NO bond order in nitrogen monoxide,...Ch. 9.3 - Prob. 2RCCh. 9.3 - Prob. 3RCCh. 9.3 - 4. Among the known dioxygen species (O2+, O2, O2−...Ch. 9.3 - What is the empirical formula of Tynan purple?Ch. 9.3 - Butter yellow absorbs light with a wavelength of...Ch. 9.3 - Prob. 3CSCh. 9.A - Photoelectron spectroscopy is s1milar to the...Ch. 9.A - What is the energy of a photon with a wavelength...Ch. 9.A - Using the accompanying figure, state which...Ch. 9.A - The kinetic energy of an electron ejected from the...Ch. 9.A - The N2+ ions that are formed when electrons with...Ch. 9 - Draw the Lewis structure for chloroform, CHCl3....Ch. 9 - Draw the Lewis structure for NF3. What are its...Ch. 9 - Draw the Lewis structure for hydroxylamine, H2NOH....Ch. 9 - Draw the Lewis structure for 1,...Ch. 9 - Draw the Lewis structure for carbonyl fluoride,...Ch. 9 - Draw the Lewis structure for acetamide, CH3CONH2....Ch. 9 - Specify the electron-pair and molecular geometry...Ch. 9 - Specify the electron-pair and molecular geometry...Ch. 9 - Prob. 9PSCh. 9 - What is the hybrid orbital set used by each of the...Ch. 9 - Draw the Lewis structures of the acid HPO2F2 and...Ch. 9 - Draw the Lewis structures of the arid HSO3F and...Ch. 9 - What is the hybridization of the carbon atom in...Ch. 9 - What is the hybridization of the carbon atoms in...Ch. 9 - What is the electron-pair and molecular geometry...Ch. 9 - Prob. 17PSCh. 9 - For each compound below, decide whether cis and...Ch. 9 - Molecular Orbital Theory (See Examples 9.49.6.)...Ch. 9 - Give the electron configurations for the ions Li2+...Ch. 9 - Platinum hexafluoride is an extremely strong...Ch. 9 - When potassium and oxygen react, one of the...Ch. 9 - Among the following, which has the shortest bond...Ch. 9 - Consider the following list of small molecules and...Ch. 9 - Prob. 27PSCh. 9 - The nitrosyl ion. NO+, has an interesting...Ch. 9 - These questions are not designated as to type or...Ch. 9 - What is the OSO angle and the hybrid orbital set...Ch. 9 - Sketch the resonance structures for the nitrite...Ch. 9 - Sketch the resonance structures for the nitrate...Ch. 9 - Sketch the resonance structures for the N2O...Ch. 9 - Compare the structure and bonding in CO2 and CO32...Ch. 9 - Numerous molecules are detected in deep space....Ch. 9 - Acrolein, a component of photochemical smog, has a...Ch. 9 - The organic compound below is a member of a class...Ch. 9 - The compound sketched below is acetylsalicylic...Ch. 9 - Phosphoserine is a less-common amino acid. (a)...Ch. 9 - Lactic acid is a natural compound found in sour...Ch. 9 - Cinnamaldehyde ocaus naturally in cinnamon oil....Ch. 9 - The ion Si2 was reported in a laboratory...Ch. 9 - The simple valence bond picture of O2 does not...Ch. 9 - Nitrogen, N2, can ionize to form N2+ or add an...Ch. 9 - Which of the homonuclear, diatomic molecules of...Ch. 9 - Which of the following molecules or ions are...Ch. 9 - Prob. 47GQCh. 9 - The structure of amphetamine, a stimulant, is...Ch. 9 - Menthol is used in soaps, perfumes, and foods. It...Ch. 9 - Prob. 50GQCh. 9 - Suppose you carry out the following reaction of...Ch. 9 - Ethylene oxide is an intermediate in the...Ch. 9 - The sulfamate ion, H2NSO3, can be thought of as...Ch. 9 - The compound whose structure is shown here is...Ch. 9 - Prob. 55ILCh. 9 - Carbon dioxide (CO2), dinitrogen monoxide (N2O),...Ch. 9 - Draw the two resonance structures that describe...Ch. 9 - Draw a Lewis structure for diimide, HNNH. Then,...Ch. 9 - Prob. 59SCQCh. 9 - Consider the three fluorides BF4, SiF4, and SF4....Ch. 9 - When two amino acids react with each other, they...Ch. 9 - What is the connection between bond order, bond...Ch. 9 - When is it desirable to use MO theory rather than...Ch. 9 - Show how valence bond theory and molecular orbital...Ch. 9 - Three of the four molecular orbitals for...Ch. 9 - Lets look more closely at the process of...Ch. 9 - Borax has the molecular formula Na2B4O5(OH)4. The...Ch. 9 - A model of the organic compound allene is shown...Ch. 9 - Prob. 69SCQCh. 9 - Prob. 70SCQCh. 9 - Bromine forms a number of oxides of varying...Ch. 9 - Prob. 72SCQCh. 9 - Urea reacts with malonic acid to produce...
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- Given the bonds C N, C H, C Br, and S O, (a) which atom in each is the more electronegative? (b) which of these bonds is the most polar?arrow_forwardBond 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_forwardBest Lewis Formula and Molecular Geometry A student writes the Lewis electron-dot formula for the carbonate anion, CO32, as a Does this Lewis formula obey the octet rule? Explain. What are the formal charges on the atoms? Try describing the bonding for this formula in valence bond terms. Do you have any difficulty doing this? b Does this Lewis formula give a reasonable description of the electron structure, or is there a better one? If there is a better Lewis formula, write it down and explain why it is better. c The same student writes the following resonance description for CO2: Is there something wrong with this description? (What would you predict as the geometries of these formulas?) d Is one or the other formula a better description? Could a value for the dipole moment help you decide? e Can you write a Lewis formula that gives an even better description of CO2? Explain your answer.arrow_forward
- a Carbonyl fluoride, COF2, is an extremely poisonous gas used in organofluorine synthesis. Give the valence bond description of the carbonyl fluoride molecule. (Both fluorine atoms are attached to the carbon atom.) b Nitrogen, N2, makes up about 80% of the earths atmosphere. Give the valence bond description of this molecule.arrow_forwardUsing the bond dissociation enthalpies in Table 8.8, estimate the enthalpy of combustion of gaseous methane, CH4, to give water vapor and carbon dioxide gas.arrow_forward1. Which of the following species has the longest N—O bond? NO3 NO+ NO2− H2NOHarrow_forward
- Draw all the equivalent resonance structures for BrO 3¯ on a piece of paper and then fill in the blanks. Draw the structure in such a way that the formal charge on the central atom is zero. Molecular geometry: Number of equivalent resonance structures: Bond order of Br-O bond(s): (fractions rounded to 2 decimal places, e.g. 1/2 will be 0.50 , 4/3 will be 1.33 and 5/3 will be 1.67) Formal charge on terminal atoms participating in resonancearrow_forwardBased only on periodic trends, arrange the following bonds in order of increasing bond length. Note: These are not intended to be molecules; they are simply covalent bonds. Part 3 of 3 N-N, N-0, N= 0 The (Choose one) v bond is the shortest, followed by the (Choose one) bond is the longest. bond, and the (Choose one)arrow_forwardWhich of the following molecules has the greatest bond energy? 02 H2 O N2arrow_forward
- Both carbon and oxygen are nonmetals, having 4 and 6 valence electrons, respectively. In this type of bond, a central atom must be identified. Carbon and Oxygen- Carbon Dioxide Bonds must be formed depending on the number of bonding and non-bonding electrons. Non-bonding electrons are called lone pairs, they are the ones left at the end of bonding. The illustration of its bonding is shown below: CO, Centras Atom ? To tal vE, 4 +(2x b)- 뇨 :4 VE 6 VE H of nun- bonding e :%D= If you investigate the illustration, you will notice that carbon atom is double bonded to two oxygen atoms. The reason for that is because carbon atom must also have complete eight electrons, therefore octet rule must also be followed at the same time. Using the sample figure, let us answer the following problems. DIRECTION: Show the bond fomation of the following compounds. SHOW YOUR SOLUTION. 1. CH,O. 2. . HCN 3. NH3 PROCESSING QUESTION What basic Science Process Skills have you openly demonstrated in forming…arrow_forwardConsider the two molecules BrO2- and Br2O. They both have Br as the central atom. Which do you think is most stable based on resonance structures? Which has the smaller angle?arrow_forwardUse average bond enthalpies (Table 8.3) to estimate ΔH forthe atomization of benzene, C6H6:C6H6(g)--->6 C(g) + 6 H(g)Compare the value to that obtained by using ΔHf° datagiven in Appendix C and Hess’s law. To what do you attributethe large discrepancy in the two values?arrow_forward
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