If bond energy of N-H- H-H and N- N are a- b and c respectively- then - H for the reaction- 2NH3- N2-3H2 is-

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Standard XII

Physics

Calorimetry

If bond energ...

Question

If bond energy of $N - H, H - H$ and $N \equiv N$ are a, b and c respectively, then $Δ H$ for the reaction, $2 N H_{3} \to N_{2} + 3 H_{2}$ is?

6a-3b-c

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6a+3b+c

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a+6b-c

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6a+b-3c

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Solution

The correct option is A 6a-3b-c

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If BE (bond energy) of N

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{Δ H}_{r} = X_{1} + {3 X}_{2} - {2 X}_{3}

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Given the bond energies $N \equiv N$ , $H - H$ and $N - H$ bonds are $945, 436$ and $391 k J m o l e^{- 1}$ respectively, the enthalpy of the following reaction $N_{2} (g) + 3 H_{2} (g) \to 2 N H_{3} (g)$ is

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If bond energy of N−H,H−H and N≡N are a, b and c respectively, then ΔH for the reaction, 2NH3→N2+3H2 is?

The correct option is A 6a-3b-c

If bond energy of $N - H, H - H$ and $N \equiv N$ are a, b and c respectively, then $Δ H$ for the reaction, $2 N H_{3} \to N_{2} + 3 H_{2}$ is?