Formation of ammonia is shown by the reaction, N₂(g) + 3H₂(g) → 2NH₃(g); ΔH° = -91.8 kJ mol⁻¹. What will be the enthalpy of reaction for the decomposition of NH₃ according to the reaction? 2NH₃(g) → N₂(g) + 3H₂(g); ΔH° = ?
A
-91.8 kJ mol⁻¹
B
+91.8 kJ mol⁻¹
C
-45.9 kJ mol⁻¹
D
+45.9 kJ mol⁻¹

Question

Formation of ammonia is shown by the reaction, N₂(g) + 3H₂(g) → 2NH₃(g); ΔH° = -91.8 kJ mol⁻¹. What will be the enthalpy of reaction for the decomposition of NH₃ according to the reaction? 2NH₃(g) → N₂(g) + 3H₂(g); ΔH° = ?

A

-91.8 kJ mol⁻¹

B

+91.8 kJ mol⁻¹

C

-45.9 kJ mol⁻¹

D

+45.9 kJ mol⁻¹

Accepted Answer

+91.8 kJ mol⁻¹

Answer

-91.8 kJ mol⁻¹

Answer

-45.9 kJ mol⁻¹

Answer

+45.9 kJ mol⁻¹

STANDARD Chemistry Enthalpy Changes MCQ Question

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