Free response · Unit 4 Beta

Making ammonia in a closed box

Short free response · 4 points

The question

Name: ______________________   Date: ____________   Making ammonia in a closed box (4 points)

Particle view

Before the reaction

HHNNNNHHHHHHHHHHNNBefore

Key: blue N, nitrogen atom; white H, hydrogen atom. The gases react completely by N₂(g) + 3H₂(g) → 2NH₃(g).

  1. (a) Identify the limiting reactant. Justify your answer using the diagram. [1 point]

  2. (b) Draw (or describe precisely) the contents of the box after the reaction is complete, using the same key. [1 point]

  3. (c) In a real reactor, 56.0 g of N₂ (28.02 g/mol) reacts with 9.00 g of H₂ (2.016 g/mol). Calculate the theoretical yield of NH₃ (17.03 g/mol) in grams. [2 points]