odule 3 Problem Set 3 Question 1 Not yet graded / 0 pts Hess' Law Problems

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 H2 (g) + 2 N2 (g) ΔH = + 91.8 kJ) 3 (2 H2 (g) + O2 (g) → 2 H2O (g) ΔH = - 483.7 kJ) 2 ( N2 (g) + O2 (g) → 2 NO (g) ΔH = 180.6 kJ) 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g) ΔHrxn = - 906.3 kJ ΔHrxn = 2 (+ 91.8) + 3 (-483.7) + 2 (180.6) = - 906.3 kJ Question 2 Not yet graded / 0 pts Hess' Law Problems This study source was downloaded by from CourseH on :02:53 GMT -05:00 2. Determine th