using the data (all values are in kilocalories per mole at 25C) given below, calculate the bond energy of C-C and C-H bonds
∆H◦combustion(ethane) = -372.0
∆H◦Combustion (propane) =-530
∆H◦ for C(graphite) àC(g) =172
Bond energy of H-H = 104
∆H◦ of H2O (l) = -68
∆H◦ for CO2 (g) = -94
Please find below the solution to the asked query:
Let the bond energy of C−C be x k cal and that of C−H be y k cal.
The reaction for the formation of propane is given as:
The reaction for the formation of ethane is given as:
Now, , gives
By equations (5), (6), (7) and (8),
Hope this information will clear your doubts.
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.