Consider the following thermochemical equation-C 2 H 4- H 2- C 2 H 6 - H 1-32-7 kcal1-3- butadiene -2 H 2- C 4 H 10 - H 2-40-2 kcalTherefore the magnitude of resonance energy of 1-3 -butadiene is- kcal

Given: C_2H_4+H_2→ C_2H_6; H_1= 32.7 kcal 1,3 butadiene+2H_2→ C_4H_10; H_2= 40.2 kcal The resonance energy of 1,3 butadiene is given as = (experimental value ...

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Standard XII

Chemistry

Enthalpy

Consider the ...

Question

Consider the following thermochemical equation:
$C_{2} H_{4} + H_{2} \to C_{2} H_{6}; △ H_{1} = - 32.7 k c a l$
$1, 3 - b u t a d i e n e + 2 H_{2} \to C_{4} H_{10}; △ H_{2} = - 40.2 k c a l$
Therefore the magnitude of resonance energy of 1,3-butadiene is: $k c a l$

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Solution

Given:
$C_{2} H_{4} + H_{2} \to C_{2} H_{6}; △ H_{1} = - 32.7 k c a l$
$1, 3 - b u t a d i e n e + 2 H_{2} \to C_{4} H_{10}; △ H_{2} = - 40.2 k c a l$

The resonance energy of 1,3-butadiene is given as = (experimental value) - (calculated value)
$= △ H_{2} - 2 △ H_{1}$
$= - 40.2 - (2 \times - 32.7) = 25.2 k c a l$

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Similar questions

Q. If the enthalpy change for hydrogenation of ethylene is -132 kJ/mole and the enthalpy of formation of 1, 3-butadiene (g) and butane (g) are 115 kJ/mol and -140 kJ/mole respectively then calculate the magnitude of resonance energy of 1, 3-butadiene (in kJ)?

Q. If enthalpy change for hydrogenation of ethylene is

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Q. From the following thermochemical equations:

C_{2} H_{4} \to C_{2} H_{6}; △ H = - 32.7 k c a l

C_{6} H_{6} + 3 H_{2} \to C_{6} H_{12}; △ H = - 49.2 k c a l

Calculate resonance energy of benzene.

Following are the thermochemical reactions:

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kcal/mol

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Consider the following thermochemical equation: C2H4+H2→C2H6; △H1=−32.7 kcal 1,3−butadiene+2H2→C4H10; △H2=−40.2 kcal Therefore the magnitude of resonance energy of 1,3-butadiene is: kcal

Given: C2H4+H2→C2H6; △H1=−32.7 kcal 1,3−butadiene+2H2→C4H10; △H2=−40.2 kcal The resonance energy of 1,3-butadiene is given as = (experimental value) - (calculated value) =△H2−2△H1 =−40.2−(2×−32.7)=25.2 kcal

Consider the following thermochemical equation:
$C_{2} H_{4} + H_{2} \to C_{2} H_{6}; △ H_{1} = - 32.7 k c a l$
$1, 3 - b u t a d i e n e + 2 H_{2} \to C_{4} H_{10}; △ H_{2} = - 40.2 k c a l$
Therefore the magnitude of resonance energy of 1,3-butadiene is: $k c a l$