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odule 3 Problem Set 3 Question 1 Not yet graded / 0 pts Hess' Law Problems
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---7June 20242023/2024A+
- Module 3 
Problem Set 3 
Question 1 
Not yet graded / 0 pts 
Hess' Law Problems 
1. The combustion of ammonia by the following reaction yields nitric oxide 
and water 
 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g) 
Determine the heat of reaction (ΔHrxn) for this reaction by using the following 
thermochemical data: 
N2 (g) + O2 (g) → 2 NO (g) ΔH = 180.6 kJ 
N2 (g) + 3 H2 (g) → 2 NH3 (g) ΔH = - 91.8 kJ 
2 H2 (g) + O2 (g) → 2 H2O (g) ΔH = - 483.7 kJ 
Your Answer: 
2 (2 NH3 (g) → 3 ...
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