Question

How much heat in Kj is released when nitrogen and hydrogen react to form 50.0 grams of ammonia

Answer 1

Given:

Amount of ammonia formed = 50 gram

To Find:

Amount of heat released in kJ.

Calculation:

- The formation of ammonia is given as:

N₂ + 3 H₂ → 2 NH₃   ΔH = - 92 kJ

⇒ Heat liberated for the formation of 34 gram of ammonia = - 92 kJ

⇒ Heat liberated for the formation of 50 gram of ammonia = (- 92/34) × 50

⇒ Heat liberated for the formation of 50 gram of ammonia = - 135.29 kJ

- So when nitrogen and hydrogen react to form 50.0 grams of ammonia, 135.29 kJ heat is released.