The enthalpies of combustion of cyclohexane ( | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The hydrogenation reaction of cyclohexene is: $C_6H_{10} + H_2 \rightarrow C_6H_{12}$The heat of reaction $(\Delta H_{hydro})$ is given by the dif

Vedclass · Accepted Answer

$-121$

Vedclass · Answer

(A) The hydrogenation reaction of cyclohexene is: $C_6H_{10} + H_2 ightarrow C_6H_{12}$The heat of reaction $(\Delta H_{hydro})$ is given by the difference between the sum of enthalpies of combustion of reactants and products:$\Delta H_{hydro} = \sum \Delta H_{c}(	ext{reactants}) - \sum \Delta H_{c}(	ext{products})$$\Delta H_{hydro} = [\Delta H_{c}(C_6H_{10}) + \Delta H_{c}(H_2)] - [\Delta H_{c}(C_6H_{12})]$Substituting the given values:$\Delta H_{hydro} = [-3800 + (-241)] - [-3920]$$\Delta H_{hydro} = -4041 + 3920$$\Delta H_{hydro} = -121 \, kJ \, mol^{-1}$

The enthalpies of combustion of cyclohexane $(C_6H_{12})$,cyclohexene $(C_6H_{10})$,and $H_2$ are $-3920, -3800$,and $-241 \, kJ \, mol^{-1}$ respectively. The heat of hydrogenation of cyclohexene is ...... $kJ \, mol^{-1}$.

Similar Questions

Which of the following substances has the highest value of standard molar enthalpy of formation at $298 \ K$?

The average $C-H$ bond energy is $416 \ kJ \ mol^{-1}$. Which of the following equations correctly represents the bond dissociation of $CH_4$?

The heat of combustion of $C$,$S$ and $CS_2$ are $-393.3 \ kJ$,$-293.7 \ kJ$ and $-1108.76 \ kJ$ respectively. What will be the heat of formation of $CS_2$ in $kJ$?

The bond dissociation energies of $XY$,$X_2$,and $Y_2$ (all diatomic molecules) are in the ratio $1 : 1 : 0.5$. If the enthalpy of formation of $XY$ is $\Delta_fH = -200 \ kJ \ mol^{-1}$,find the bond dissociation energy of $X_2$ in $kJ \ mol^{-1}$.

If the enthalpy of combustion of carbon is $-393 \, kJ \, mol^{-1}$,calculate the heat produced by the combustion of $1 \, g$ of carbon in $kJ$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module