ThermochemistryMedium
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
If x1, x2 and x3 are enthalpies of H - H, O = O and O - H bonds respectively, and x4 is the enthalpy of vaporisation of ...The standard enthalpies of formation of NH3(g), CuO(s) and H2O(l) are −46, −155 and −285 kJ/mol, respectively. The entha...When carbon is burnt in a definite amount of oxygen, the product will be CO, if excess amount of carbon is present and t...Which of the following reaction represent the bond energy :-...Consider the following data(i) $2Al(s) + 6HCl(aq) \rightarrow {Al}_{2}{Cl}_{6}(aq) + 3H_{2}(\text{ }g) + 1200\text{ }kJ/...