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Ch.8 - Basic Concepts of Chemical Bonding
Chapter 8, Problem 71e

State whether each of these statements is true or false. (e) The longer the bond, the more energy is stored chemical bonds.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Bond Length and Bond Energy

Bond length refers to the distance between the nuclei of two bonded atoms. Generally, longer bonds are associated with lower bond energy, meaning they are weaker and require less energy to break. This is because the atoms are held together less tightly, allowing for greater movement and less overlap of their electron clouds.
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Types of Chemical Bonds

Chemical bonds can be classified into different types, such as ionic, covalent, and metallic bonds. Each type has distinct characteristics regarding bond length and energy. For instance, covalent bonds can vary in length and strength depending on the atoms involved, while ionic bonds typically have shorter, stronger interactions due to the electrostatic forces between charged ions.
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Energy Storage in Chemical Bonds

Chemical bonds store energy, which can be released or absorbed during chemical reactions. The energy stored in a bond is related to its strength; stronger bonds (shorter lengths) store more energy. Therefore, the statement that longer bonds store more energy is false, as weaker, longer bonds actually store less energy.
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Related Practice
Textbook Question

There are many Lewis structures you could draw for sulfuric acid, H2SO4 (each H is bonded to an O). (a) What Lewis structure(s) would you draw to satisfy the octet rule?

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Textbook Question

There are many Lewis structures you could draw for sulfuric acid, H2SO4 (each H is bonded to an O). (b) What Lewis structure(s) would you draw to minimize formal charge?

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Textbook Question

Some chemists believe that satisfaction of the octet rule should be the top criterion for choosing the dominant Lewis structure of a molecule or ion. Other chemists believe that achieving the best formal charges should be the top criterion. Consider the dihydrogen phosphate ion, H2PO4-, in which the H atoms are bonded to O atoms. (b) What is the predicted dominant Lewis structure if achieving the best formal charges is the top criterion?

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Textbook Question
Draw the Lewis structure for NO+ . Is the nitrogen– oxygen bond in NO+ longer, shorter, or the same length as the nitrogen–oxygen bond in NO? Explain. Draw the Lewis structure for NO+ .
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Textbook Question

Consider the lattice energies of the following Group 2A compounds: BeH2, 3205 kJ/mol; MgH2, 2791 kJ/mol; CaH2, 2410 kJ/mol; SrH2, 2250 kJ/mol; BaH2, 2121 kJ/mol. (a) What is the oxidation number of H in these compounds?

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Textbook Question

The ionic compound CaO crystallizes with the same structure as sodium chloride (Figure 8.3). (a) In this structure, how many O2- are in contact with each Ca2+ ion (Hint: Remember the pattern of ions shown in Figure 8.3 repeats over and over again in all three directions.)

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