Neco Model Questions Vol1 2018 Chemistry Question 44

Practice objective / multiple choice question 44 from the 2018 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Hard Difficulty
Question 44 NECO_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

Ammonium nitrate \(\text{NH}_4\text{NO}_3(s)\) is thermally decomposed in a sealed 2.0 L container at 500 °C according to \(\text{NH}_4\text{NO}_3(s) \rightarrow \text{N}_2\text{O(g)} + 2\,\text{H}_2\text{O(g)}\). If 10.0 g of the solid is completely decomposed, (a) calculate the total pressure inside the container after the reaction, (b) the partial pressures of \(\text{N}_2\text{O}\) and \(\text{H}_2\text{O}\), and (c) the percentage increase in pressure compared with the initial pressure of 1 atm (the container initially contained only inert gas at 1 atm). Assume ideal‑gas behaviour.

Answer Options

A. Total pressure ≈11.2 atm; p(N₂O) ≈3.8 atm, p(H₂O) ≈7.4 atm; pressure increase ≈1020 %
B. Total pressure ≈13.6 atm; p(N₂O) ≈4.5 atm, p(H₂O) ≈9.1 atm; pressure increase ≈1260 %
Correct Answer C. Total pressure ≈12.9 atm; p(N₂O) ≈4.0 atm, p(H₂O) ≈8.0 atm; pressure increase ≈1188 %
D. Total pressure ≈10.5 atm; p(N₂O) ≈3.5 atm, p(H₂O) ≈7.0 atm; pressure increase ≈950 %
Correct Answer
C
Correct Option:
Total pressure ≈12.9 atm; p(N₂O) ≈4.0 atm, p(H₂O) ≈8.0 atm; pressure increase ≈1188 %

About This Question

This is Neco Model Questions Vol1 2018 Chemistry Question 44. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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