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Problem 3: Use the principle of stoichiometry to determine the amount of oxygen that is required to convert octane (C8H18) to CO2 and H2O. a. Write a properly balanced overall reaction. b. Calculate the mass of O2 required per kg of octane

Problem 3: Use the principle of stoichiometry to determine the amount of oxygen that is required to convert octane (C8H18) to CO2 and H2O. a. Write a properly balanced overall reaction. b. Calculate the mass of O2 required per kg of octane

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Answer question 3 subject is Environmental Engineering
**Problem 1:** Determine if the following are REDOX reactions (yes/no). If so, identify which element is oxidized and which element is reduced. Also, identify which element is oxidized and which element is reduced. Then identify the oxidizing agent and the reducing agent. | Reaction | REDOX? Yes/No | Element Oxidized | Element Reduced | Oxidizing Agent | Reducing Agent | |---------------------------------|---------------|------------------|-----------------|-----------------|----------------| | 1. PbCl₂ + Li₂S → PbS + 2LiCl | | | | | | | 2. 2Na + Cl₂ → 2NaCl | | | | | | | 3. 2NH₃ → 3H₂ + N₂ | | | | | | **Problem 2:** Estimate the scaling potential using Langelier saturation index for treated waste water with the following wastewater characteristics. Use carbonate equilibrium constants Kₐ1, Kₐ2, and Kₛₚ at 25 °C are 4.47 × 10⁻⁷, 4.48 × 10⁻¹¹, and 4.57 × 10⁻⁹ respectively. | Constituent Concentration | g/m³ | |---------------------------|------| | Ca²⁺ | 140 | | K⁺ | 14.5 | | Mg²⁺ | 13.1 | | Na⁺ | 125 | | HCO₃⁻ | 420 | | CO₃²⁻ | ? | | Cl⁻ | 85.7 | | SO₄²⁻ | 277 | | pH | 9.3 | **Problem 3:** Use the principle of stoichiometry to determine the amount of oxygen that is required to convert octane (C₈H₁₈) to CO₂ and H₂O. a. Write a properly balanced overall reaction. b. Calculate the mass of O₂ required per kg of octane. **Problem 4:** What is the COD and ThOD of a 2.5 mM solution of C₄₀H₅₁O
Transcribed Image Text:**Problem 1:** Determine if the following are REDOX reactions (yes/no). If so, identify which element is oxidized and which element is reduced. Also, identify which element is oxidized and which element is reduced. Then identify the oxidizing agent and the reducing agent. | Reaction | REDOX? Yes/No | Element Oxidized | Element Reduced | Oxidizing Agent | Reducing Agent | |---------------------------------|---------------|------------------|-----------------|-----------------|----------------| | 1. PbCl₂ + Li₂S → PbS + 2LiCl | | | | | | | 2. 2Na + Cl₂ → 2NaCl | | | | | | | 3. 2NH₃ → 3H₂ + N₂ | | | | | | **Problem 2:** Estimate the scaling potential using Langelier saturation index for treated waste water with the following wastewater characteristics. Use carbonate equilibrium constants Kₐ1, Kₐ2, and Kₛₚ at 25 °C are 4.47 × 10⁻⁷, 4.48 × 10⁻¹¹, and 4.57 × 10⁻⁹ respectively. | Constituent Concentration | g/m³ | |---------------------------|------| | Ca²⁺ | 140 | | K⁺ | 14.5 | | Mg²⁺ | 13.1 | | Na⁺ | 125 | | HCO₃⁻ | 420 | | CO₃²⁻ | ? | | Cl⁻ | 85.7 | | SO₄²⁻ | 277 | | pH | 9.3 | **Problem 3:** Use the principle of stoichiometry to determine the amount of oxygen that is required to convert octane (C₈H₁₈) to CO₂ and H₂O. a. Write a properly balanced overall reaction. b. Calculate the mass of O₂ required per kg of octane. **Problem 4:** What is the COD and ThOD of a 2.5 mM solution of C₄₀H₅₁O
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Step 1: State the given data

Required:

  • Properly balanced overall reaction of combustion of octane
  • mass of O2 required per kg of octane
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