Start Free Mock LoginAlready registered? Login here

Chemistry - Thermochemistry Question with Solution | TestHub

ChemistryThermochemistryEnthalpy of ReactionEasy2 minPYQ_2012

ChemistryEasysingle choice

Bond dissociation energy of $CH_{4}$ is $360 kJ / mol$ and $C_{2} H_{6}$ is $620 kJ / mol$ . Then bond dissociation energy of $C - C$ bond is

Options:

Answer:

Solution:

Dissociation energy of methane $=$ $360 kJ mol^{- 1}$ $∴$ Bond energy of $C - H$ bond $= \frac{360}{4} = 90 kJ$ Bond energy of ethane, $1 (C - C) + 6 (C - H) = 620 kJ / mol$ $(C - C) + 6 \times 90 = 620$ $(C - C) + 540 = 620$ $C - C = 620 - 540$ $C - C = 80 kJ mol^{- 1}$ Bond dissociation of $C - C$ bond $= 80 kJ mol^{- 1}$ .

Stream:AIIMSSubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Reaction

⏱ 2mℹ️ Source: PYQ_2012

Doubts & Discussion

Loading discussions...