04. Bond Energy
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Thermodynamics

273018 If the mass defect of ${ }_5 B^{11}$ is $0.081 u$, its average binding energy (in $\mathrm{MeV}$ ) is :

1 8.60
2 6.85
3 5.60
4 5.86
A.P.EAMCET/2008
Thermodynamics

273019 Given, the bond energies of $\mathrm{N} \equiv \mathrm{N}, \mathrm{H}-\mathrm{H}$ and $\mathrm{N}-\mathrm{H}$ bonds as 945,436 and $391 \mathrm{~kJ} / \mathrm{mol}$ respectively, the enthalpy of the reaction

1 $-93 \mathrm{~kJ}$
2 $102 \mathrm{~kJ}$
3 $90 \mathrm{~kJ}$
4 $105 \mathrm{~kJ}$
(A.P.EAMCET-1992)
Thermodynamics

273020 Average $\mathrm{C}-\mathrm{H}$ bond energy is $416 \mathrm{~kJ} \mathrm{~mol}^{-1}$. Which of the following is correct?

1 $\mathrm{CH}_4(\mathrm{~g})+416 \mathrm{~kJ} \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})$
2 $\mathrm{CH}_4(\mathrm{~g}) \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})+416 \mathrm{~kJ}$
3 $\mathrm{CH}_4(\mathrm{~g})+1664 \mathrm{~kJ} \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})$
4 $\mathrm{CH}_4(\mathrm{~g}) \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})+1664 \mathrm{~kJ}$
(A.P.EAMCET-2004)
Thermodynamics

273022 Find the $\Delta \mathrm{H}^0$ for the reaction $\mathrm{H}_2 \mathrm{O}(\mathrm{g})$ $+\mathrm{Br}_2(\mathrm{~g}) \rightarrow \mathrm{HBr}(\mathrm{g})+\mathrm{HOBr}(\mathrm{g})$ using:
Bond energy of $O-H$ bond in Water $=463 \mathrm{~kJ}$
Bond energy of $\mathrm{Br}-\mathrm{Br}$ bond in $\mathrm{Br}_2=192 \mathrm{~kJ}$
Bond energy of $\mathrm{O}-\mathrm{Br}$ bond in $\mathrm{HOBr}=234 \mathrm{~kJ}$
Bond energy of $\mathrm{H}-\mathrm{Br}$ bond in $\mathrm{HBr}=364 \mathrm{~kJ}$

1 $655 \mathrm{~kJ} . \mathrm{mol}^{-1}$
2 $598 \mathrm{~kJ} . \mathrm{mol}^{-1}$
3 $57 \mathrm{~kJ} . \mathrm{mol}^{-1}$
4 $192 \mathrm{~kJ} \cdot \mathrm{mol}^{-1}$
Shift-II
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Thermodynamics

273018 If the mass defect of ${ }_5 B^{11}$ is $0.081 u$, its average binding energy (in $\mathrm{MeV}$ ) is :

1 8.60
2 6.85
3 5.60
4 5.86
A.P.EAMCET/2008
Thermodynamics

273019 Given, the bond energies of $\mathrm{N} \equiv \mathrm{N}, \mathrm{H}-\mathrm{H}$ and $\mathrm{N}-\mathrm{H}$ bonds as 945,436 and $391 \mathrm{~kJ} / \mathrm{mol}$ respectively, the enthalpy of the reaction

1 $-93 \mathrm{~kJ}$
2 $102 \mathrm{~kJ}$
3 $90 \mathrm{~kJ}$
4 $105 \mathrm{~kJ}$
(A.P.EAMCET-1992)
Thermodynamics

273020 Average $\mathrm{C}-\mathrm{H}$ bond energy is $416 \mathrm{~kJ} \mathrm{~mol}^{-1}$. Which of the following is correct?

1 $\mathrm{CH}_4(\mathrm{~g})+416 \mathrm{~kJ} \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})$
2 $\mathrm{CH}_4(\mathrm{~g}) \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})+416 \mathrm{~kJ}$
3 $\mathrm{CH}_4(\mathrm{~g})+1664 \mathrm{~kJ} \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})$
4 $\mathrm{CH}_4(\mathrm{~g}) \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})+1664 \mathrm{~kJ}$
(A.P.EAMCET-2004)
Thermodynamics

273022 Find the $\Delta \mathrm{H}^0$ for the reaction $\mathrm{H}_2 \mathrm{O}(\mathrm{g})$ $+\mathrm{Br}_2(\mathrm{~g}) \rightarrow \mathrm{HBr}(\mathrm{g})+\mathrm{HOBr}(\mathrm{g})$ using:
Bond energy of $O-H$ bond in Water $=463 \mathrm{~kJ}$
Bond energy of $\mathrm{Br}-\mathrm{Br}$ bond in $\mathrm{Br}_2=192 \mathrm{~kJ}$
Bond energy of $\mathrm{O}-\mathrm{Br}$ bond in $\mathrm{HOBr}=234 \mathrm{~kJ}$
Bond energy of $\mathrm{H}-\mathrm{Br}$ bond in $\mathrm{HBr}=364 \mathrm{~kJ}$

1 $655 \mathrm{~kJ} . \mathrm{mol}^{-1}$
2 $598 \mathrm{~kJ} . \mathrm{mol}^{-1}$
3 $57 \mathrm{~kJ} . \mathrm{mol}^{-1}$
4 $192 \mathrm{~kJ} \cdot \mathrm{mol}^{-1}$
Shift-II
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Thermodynamics

273018 If the mass defect of ${ }_5 B^{11}$ is $0.081 u$, its average binding energy (in $\mathrm{MeV}$ ) is :

1 8.60
2 6.85
3 5.60
4 5.86
A.P.EAMCET/2008
Thermodynamics

273019 Given, the bond energies of $\mathrm{N} \equiv \mathrm{N}, \mathrm{H}-\mathrm{H}$ and $\mathrm{N}-\mathrm{H}$ bonds as 945,436 and $391 \mathrm{~kJ} / \mathrm{mol}$ respectively, the enthalpy of the reaction

1 $-93 \mathrm{~kJ}$
2 $102 \mathrm{~kJ}$
3 $90 \mathrm{~kJ}$
4 $105 \mathrm{~kJ}$
(A.P.EAMCET-1992)
Thermodynamics

273020 Average $\mathrm{C}-\mathrm{H}$ bond energy is $416 \mathrm{~kJ} \mathrm{~mol}^{-1}$. Which of the following is correct?

1 $\mathrm{CH}_4(\mathrm{~g})+416 \mathrm{~kJ} \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})$
2 $\mathrm{CH}_4(\mathrm{~g}) \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})+416 \mathrm{~kJ}$
3 $\mathrm{CH}_4(\mathrm{~g})+1664 \mathrm{~kJ} \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})$
4 $\mathrm{CH}_4(\mathrm{~g}) \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})+1664 \mathrm{~kJ}$
(A.P.EAMCET-2004)
Thermodynamics

273022 Find the $\Delta \mathrm{H}^0$ for the reaction $\mathrm{H}_2 \mathrm{O}(\mathrm{g})$ $+\mathrm{Br}_2(\mathrm{~g}) \rightarrow \mathrm{HBr}(\mathrm{g})+\mathrm{HOBr}(\mathrm{g})$ using:
Bond energy of $O-H$ bond in Water $=463 \mathrm{~kJ}$
Bond energy of $\mathrm{Br}-\mathrm{Br}$ bond in $\mathrm{Br}_2=192 \mathrm{~kJ}$
Bond energy of $\mathrm{O}-\mathrm{Br}$ bond in $\mathrm{HOBr}=234 \mathrm{~kJ}$
Bond energy of $\mathrm{H}-\mathrm{Br}$ bond in $\mathrm{HBr}=364 \mathrm{~kJ}$

1 $655 \mathrm{~kJ} . \mathrm{mol}^{-1}$
2 $598 \mathrm{~kJ} . \mathrm{mol}^{-1}$
3 $57 \mathrm{~kJ} . \mathrm{mol}^{-1}$
4 $192 \mathrm{~kJ} \cdot \mathrm{mol}^{-1}$
Shift-II
Join With Us for More Updates
Thermodynamics

273018 If the mass defect of ${ }_5 B^{11}$ is $0.081 u$, its average binding energy (in $\mathrm{MeV}$ ) is :

1 8.60
2 6.85
3 5.60
4 5.86
A.P.EAMCET/2008
Thermodynamics

273019 Given, the bond energies of $\mathrm{N} \equiv \mathrm{N}, \mathrm{H}-\mathrm{H}$ and $\mathrm{N}-\mathrm{H}$ bonds as 945,436 and $391 \mathrm{~kJ} / \mathrm{mol}$ respectively, the enthalpy of the reaction

1 $-93 \mathrm{~kJ}$
2 $102 \mathrm{~kJ}$
3 $90 \mathrm{~kJ}$
4 $105 \mathrm{~kJ}$
(A.P.EAMCET-1992)
Thermodynamics

273020 Average $\mathrm{C}-\mathrm{H}$ bond energy is $416 \mathrm{~kJ} \mathrm{~mol}^{-1}$. Which of the following is correct?

1 $\mathrm{CH}_4(\mathrm{~g})+416 \mathrm{~kJ} \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})$
2 $\mathrm{CH}_4(\mathrm{~g}) \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})+416 \mathrm{~kJ}$
3 $\mathrm{CH}_4(\mathrm{~g})+1664 \mathrm{~kJ} \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})$
4 $\mathrm{CH}_4(\mathrm{~g}) \longrightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g})+1664 \mathrm{~kJ}$
(A.P.EAMCET-2004)
Thermodynamics

273022 Find the $\Delta \mathrm{H}^0$ for the reaction $\mathrm{H}_2 \mathrm{O}(\mathrm{g})$ $+\mathrm{Br}_2(\mathrm{~g}) \rightarrow \mathrm{HBr}(\mathrm{g})+\mathrm{HOBr}(\mathrm{g})$ using:
Bond energy of $O-H$ bond in Water $=463 \mathrm{~kJ}$
Bond energy of $\mathrm{Br}-\mathrm{Br}$ bond in $\mathrm{Br}_2=192 \mathrm{~kJ}$
Bond energy of $\mathrm{O}-\mathrm{Br}$ bond in $\mathrm{HOBr}=234 \mathrm{~kJ}$
Bond energy of $\mathrm{H}-\mathrm{Br}$ bond in $\mathrm{HBr}=364 \mathrm{~kJ}$

1 $655 \mathrm{~kJ} . \mathrm{mol}^{-1}$
2 $598 \mathrm{~kJ} . \mathrm{mol}^{-1}$
3 $57 \mathrm{~kJ} . \mathrm{mol}^{-1}$
4 $192 \mathrm{~kJ} \cdot \mathrm{mol}^{-1}$
Shift-II
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