ThermochemistryHard
Question
The enthalpy of hydrogenation of benzene is −49.8 kcal/mol while its resonance energy is 36.0 kcal/mol. The enthalpy of hydrogenation of cyclohexene is
Options
A.−4.6 kcal
B.−28.6 kcal/mol
C.−85.8 kcal/mol
D.−13.8 kcal/mol
Solution
Required $\Delta H = - \left\lbrack \frac{49.8 + 36.0}{3} \right\rbrack = - 28.6\text{ kcal/mol}$
Create a free account to view solution
View Solution FreeMore Thermochemistry Questions
Calculate the magnitude of resonance energy of CO2 from the following data (in kJ/mol).Bond energies: C=O = 539.0, O=O =...The enthalpies of combustion of formaldehyde and paraformaldehyde (a polymer of formaldehyde) are −134 and −732 kcal/mol...A quantity of 0.3 g of carbon was converted into CO2 producing 2400 cal of heat. When 0.6 g of carbon was converted to C...A solution was prepared by dissolving 7.45 g of KCl in 200 g of H2O in a calorimeter with a water equivalent of 25 g. Th...A coffee cup calorimeter initially contains 125 g of water, at a temperature of 24.20C. 8g of ammonium nitrate (NH4NO3),...