Final answer:
AH° for the given reaction, we need to consider the bond energies of the bonds broken and formed. By using the given bond energies, we can calculate the AH° value by accounting for the energy required to break the bonds and the energy released by forming the bonds in the reaction.
Step-by-step explanation:
The value of AH° for the reaction C2H6 + 2 Cl2 - C2H4Cl2 + 2 HCl can be calculated using the bond energies provided. To calculate AH°, we need to consider the bond energies of the bonds broken and formed in the reaction. In this reaction, one mole of H-H bonds and one mole of Cl-Cl bonds are broken, requiring 432 kJ/mol and 243 kJ/mol of energy respectively. Two moles of H-Cl bonds are formed, releasing 432 kJ/mol of energy for each mole of H-Cl bond formed.
the total energy change (AH°) for the reaction can be calculated by subtracting the energy required to break the bonds from the energy released by forming the bonds. Using the given bond energies, we can calculate AH° as follows: AH° = (1 mol C2H6 x 2 bond energies C-H) + (1 mol Cl2 x 1 bond energy Cl-Cl) - (1 mol C2H4Cl2 x 1 bond energy C-Cl) - (2 mol HCl x 1 bond energy H-Cl) Substituting the values, we get: AH° = (1 mol x 314 kJ/mol) + (1 mol x 243 kJ/mol) - (1 mol x 339 kJ/mol) - (2 mol x 432 kJ/mol) Calculating the above expression will give us the value of AH° for the given reaction.