You visited us 1 times! Enjoying our articles? Unlock Full Access!

Resonance Effect

Use the follo...

Question

Use the following data to answer the question below.
Calculate the resonance energy of anthracene:

84 kcal/mol

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

100 kcal/mol

No worries! We‘ve got your back. Try BYJU‘S free classes today!

110 kcal/mol

No worries! We‘ve got your back. Try BYJU‘S free classes today!

116 kcal/mol

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A 84 kcal/mol
Resonance energy = Theoretical heat of hydrogenation – Experimental heat of hydrogenation.
So theoretical heat of hydrogenation (H.O.H.) for anthracene is
Theoretical $Δ H = 7 \times (- 28.6) = - 200.2$ kcal/mol
Experimental $Δ H = - 116.2$ kcal/mol
Resonance energy = 84 kcal/mol

Suggest Corrections

Similar questions

Cyclohexene H_{2} - \to N i Cyclohexane; Δ H = - 28.6 kcal/mol

Anthracene H_{2} - \to N i Tetradecahydroanthracene; Δ H = - 116.2 kcal/mol

x kcal/mol

x

C_{6} H_{6}

C_{6} H_{6}

Δ H^{\circ}

C_{6} H_{6} = - 358.5 k J m o l^{- 1}

H e a t o f a t o m i s a t i o n o f C = 716.8 k J m o l^{- 1}

C - - H, C - - C, C = = C

H - - H

436.9 k J m o l^{- 1}

Join BYJU'S Learning Program