Chemical Reactions Unit Test

Question

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Question
Use the reaction to complete the sentence.

2CO+O2→2CO2

Carbon monoxide and oxygen combine to produce carbon dioxide. The total bond energy found in all the bonds of carbon dioxide together is 1,472 kJ . The bond energy of each carbon-oxygen double bond in carbon dioxide is _____.

(1 point)
Responses

368 kJ
368 k J

736 kJ
736 k J

2,944 kJ
2944 k J

1,472 kJ
1472 k J
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Answer 1

To determine the bond energy of each carbon-oxygen double bond in carbon dioxide (CO2), we first need to understand the molecular structure of CO2. Carbon dioxide has one carbon atom bonded to two oxygen atoms, with each of the carbon-oxygen bonds being a double bond.

The total bond energy in the bonds of carbon dioxide is given as 1,472 kJ. Since there are two carbon-oxygen double bonds in a molecule of CO2, you can find the bond energy of each bond by dividing the total bond energy by the number of bonds:

\[ \text{Bond energy of each C=O bond} = \frac{\text{Total bond energy}}{\text{Number of C=O bonds}} = \frac{1,472 , \text{kJ}}{2} = 736 , \text{kJ} \]

Thus, the bond energy of each carbon-oxygen double bond in carbon dioxide is 736 kJ.