Chemistry Atoms First2e
2nd Edition
ISBN: 9781947172647
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 5, Problem 21E
The bond energy of a
single bond averages
Explain Why the triple bond is not three times as strong as a single bond.
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Chemistry Atoms First2e
Ch. 5 - Explain how σ and bonds are similar and how they...Ch. 5 - Use valence bond theory to explain the bonding in...Ch. 5 - Use valence bond theory to explain the bonding in...Ch. 5 - How many and bonds are present in the molecule...Ch. 5 - A friend tell you N2 has three bonds due to...Ch. 5 - Draw the Lewis Structures for CO2andCO , and...Ch. 5 - Why is the concept of hybridization required in...Ch. 5 - Give the shape that describes each hybrid orbital...Ch. 5 - Explain why a carbon atom cannot from five bonds...Ch. 5 - What is the hybridization of the central atom in...
Ch. 5 - A molecule with the formula AB3 could have one of...Ch. 5 - Methionine, CH3SCH2CH2CH(NH2)CO2H, is an amino...Ch. 5 - Sulfuric acid is manufactured by a series of...Ch. 5 - Two important industrial chemicals,...Ch. 5 - Analysis of a compound indicates that it contains...Ch. 5 - Consider nitrous acid, HNO2(HONO). (a) Write a...Ch. 5 - Strike-anywhere matches contain a layer of KC1O3...Ch. 5 - Identify the hybridization of each carbon atom in...Ch. 5 - Write Lewis structures for NF3andPF5 . On the...Ch. 5 - In addition to NF3, two other fluoro derivatives...Ch. 5 - The bond energy of a C-C single bond averages...Ch. 5 - For the carbonate ion, CO32 -, draw all of the...Ch. 5 - A useful solvent that will dissolve salts as well...Ch. 5 - For the molecule allene, H2C=C=CH2, give the...Ch. 5 - Identify the hybridization of the central atom in...Ch. 5 - Describe the molecular geometry and hybridization...Ch. 5 - For each of the following molecules, indicate the...Ch. 5 - For each of the following structures, determine...Ch. 5 - Draw the orbital diagram for carbon in CO2 showing...Ch. 5 - Sketch the distribution of electron density in the...Ch. 5 - How are the following similar, and how do they...Ch. 5 - If molecular orbitals are created by combining...Ch. 5 - Can a molecule with an odd number of electrons...Ch. 5 - Can a molecule with an even number of electrons...Ch. 5 - Why are bonding molecular orbital lower in energy...Ch. 5 - Calculate the bond order for an ion with this...Ch. 5 - Explain why an electron in the bonding molecular...Ch. 5 - Predict the valence electron molecular orbital...Ch. 5 - Determine the bond order of each member of the...Ch. 5 - For the first ionizations energy for an N2...Ch. 5 - Compare the atomic and molecular orbitaI diagrams...Ch. 5 - Which of the period 2 homonuclear diatomic...Ch. 5 - A friend tells you that the 2s orbital for...Ch. 5 - True or false: Boron contains 2s22p1 valence...Ch. 5 - What charge would be needed on F2 to generate an...Ch. 5 - Predict whether the MO diagram for S2 would show...Ch. 5 - Explain why N22+ is diamagnetic, while O24+, which...Ch. 5 - Using the MO diagrams, predict the bond order for...
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- The bond energy for a CH bond is about 413 kJ/mol in CH4 but 380 kJ/mol in CHBr3. Although these values are relatively close in magnitude, they are different. Explain why they are different. Does the fact that the bond energy is lower in CHBr3, make any sense? Why?arrow_forwardGiven 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_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
- The bond energy of a C—C single bond averages 347 kJ mol-1; that of a CC triple bond averages 839 kJ mol-1. Explain why the triple bond is not three times as strong as a single bond.arrow_forwardGiven the following data: NO2(g) NO(g) + O(g)H = 233 kJ 2O3(g) 3O2(g)H = 427 kJ NO(g) + O3(g) NO2(g) + O2(g)H = 199 kJ Calculate the bond energy for the O2 bond, that is, calculate H for: O2(g) 2O(g)H = ?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_forward
- Hydrogenation reactions, which involve the addition of H2 to a molecule, are widely used in industry to transform one compound into another. For example, 1-butene (C4H8) is converted to butane (C4H10) by addition of H2. Use the bond dissociation enthalpies in Table 8.8 to estimate the enthalpy change for this hydrogenation reaction.arrow_forwardEstimate ΔrH° for forming 2 mol ammonia from molecular nitrogen and molecular hydrogen. Is this reaction exothermic or endothermic?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_forward
- Three known isomers exist of N2CO, with the atoms in these sequences: NOCN; ONNC; and ONCN. Write resonance structures for each isomer and use formal charge to predict which isomer is the most stable.arrow_forwardWhich statement(s) is/are true about bond enthalpy? (a) The bond energy for a triple bond between A and B is three times that of a single bond between A and B. (b) H for the breaking of a bond is always a negative number. (c) Energy is required to make a bond. (d) Bond enthalpy is defined only for bonds broken or formed in the gaseous state. (e) The presence of bonds does not influence the geometry of a molecule. However, the presence of bonds affects the value of the bond enthalpy between two atoms.arrow_forward
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