High School

Using the table of bond energies estimate the heat of combustion

of

2-methyl-3-hexyne.

Standard Bond Energies Single Bonds AH** Single Bonds AH°* Multiple Bonds AH** H-H 104.2 B-F 150 C=C 146 C-C 83 B-O 125 N=N 109 N-N 38.4 C-N 73 O=0 119 0-0 35 N-CO 86 C=N 147 F-F 36.6 C-O 85.5 C=O (C

Answer :

Final answer:

The estimated heat of combustion of 2-methyl-3-hexyne is approximately 2268.8 kJ/mol.

Explanation:

The heat of combustion of a compound can be estimated using the concept of bond energies. Bond energy is the amount of energy required to break a specific bond in a molecule. By summing up the bond energies of all the bonds broken and formed during the combustion reaction, we can estimate the heat of combustion.

2-methyl-3-hexyne is a compound with the molecular formula C8H14. To estimate its heat of combustion, we need to identify the bonds present in the molecule and calculate the total energy released during combustion.

The molecule contains the following bonds:

  • C-C single bonds
  • C=C double bond
  • C-H bonds

Using the given table of bond energies, we can find the bond energies for each of these bonds:

  • C-C single bond: 83 kJ/mol
  • C=C double bond: 146 kJ/mol
  • C-H bond: approximately 104.2 kJ/mol

To calculate the heat of combustion, we need to determine the number of each type of bond in the molecule. In 2-methyl-3-hexyne, there are 8 C-C single bonds, 1 C=C double bond, and 14 C-H bonds.

Now, we can calculate the total energy released during combustion:

Total energy released = (8 * 83) + (1 * 146) + (14 * 104.2) kJ/mol

Total energy released = 664 + 146 + 1458.8 kJ/mol

Total energy released = 2268.8 kJ/mol

Therefore, the estimated heat of combustion of 2-methyl-3-hexyne is approximately 2268.8 kJ/mol.

Learn more about heat of combustion of 2-methyl-3-hexyne here:

https://brainly.com/question/32790606

#SPJ14

Other Questions