1. Tardigrade
  2. Question
  3. Chemistry
  4. The standard enthalpy of formation of NH3 is - 46.0 kj/ mol. If the enthalpy of formation of H2 from its atoms is 6 kj/mol and that of N2 is - 712 kj/ mol, the average bond enthalpy of N — H bond in NH3 is :

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Q. The standard enthalpy of formation of $NH_3$ is $- 46.0\, kj/ mol$. If the enthalpy of formation of $H_2$ from its atoms is $6 \,kj/mol$ and that of $N_2$ is $- 712 \,kj/ mol$, the average bond enthalpy of $N — H$ bond in $NH_3$ is :

JEE MainJEE Main 2014Thermodynamics

Solution:

Correct answer is (c) +352 kJ/mol

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