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Chapter 15: Problem 2

How do the calculated bond orders for ethane, ethene, and ethyne compare to bond orders predicted by the Lewis structures?

Short Answer

Expert verified
The calculated bond orders for ethane, ethene, and ethyne match the ones predicted by Lewis structures. For Ethane, bond order is 1; for Ethene, bond order is 2; and for Ethyne, bond order is 3.

Step by step solution

01

Lewis Structures of Molecules

Draw the Lewis structures of the mentioned molecules. Ethane (C2H6) has a single bond between carbon atoms, Ethene (C2H4) has a double bond between carbon atoms, and Ethyne (C2H2) has a triple bond between carbon atoms.
02

Understanding Bond Orders

The bond order is a numerical value that indicates the number of pairs of electrons between any two atoms in a molecule. In order to be calculated, it requires the identification of the type of bond (single, double or triple). A single bond has bond order 1, a double bond has bond order 2 and a triple bond has bond order 3.
03

Calculating Bond Orders

For each molecule, identify the bond between the carbon atoms and note the bond order. Ethane, with a single bond, has bond order 1. Ethene, with a double bond, has bond order 2. Ethyne, with a triple bond, has bond order 3.
04

Comparing Calculated and Predicted Bond Orders

The calculated bond orders from the Lewis structures match up with the predicted bond orders. This is because the concept of bond order is intrinsically linked with the type of bond in the molecule, as represented in a Lewis structure.

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Most popular questions from this chapter

How do the calculated bond orders for benzene compare to the bond orders predicted by the Lewis structure?

Predict the \(\mathrm{C}-\mathrm{C}\) bond length for a molecule with a \(\mathrm{C}-\mathrm{C}\) bond order of \(1.5\).

Experimentally, we find that all six \(\mathrm{C}-\mathrm{C}\) bonds in benzene have the same bond strength (or bond energy), \(509 \mathrm{~kJ} /\) mole. Is this fact more consistent with the bond orders predicted by the Lewis structure or with the calculated bond orders for benzene?
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