Skip to main content

Solucionario Ocon Tojo Capitulo 3 2021

In the classic chemical engineering text Problemas de Ingeniería Química by Joaquín Ocón García and Gabriel Tojo Barreiro, Chapter 3 focuses on Evaporation

. This chapter covers the concentration of aqueous solutions through the removal of solvent (typically water) using heat. Overview of Chapter 3: Evaporation

The problems in this chapter typically involve calculating the performance and design parameters of evaporators. Key concepts addressed include: Simple Evaporators

: Basic systems concentrating solutions like glycerin or salt. Boiling Point Elevation (BPE)

: The effect of solutes on the boiling temperature of the solution compared to pure solvent. Mass and Energy Balances

: Fundamental equations used to determine the amount of evaporated water and the heating steam required. Heat Transfer Coefficients : Calculating the area ( ) and heat flow ( ) using the formula Common Problems and Solutions Solucionario Ocon Tojo Capitulo 3

Students often look for "solucionarios" (solution manuals) to guide them through specific exercises. Examples found in this chapter include: Concentrating Glycerin

: Problems where a glycerin solution is concentrated from a low percentage (e.g., 5%) to a higher one (e.g., 30%) using specific vacuum pressures and steam temperatures. Caustic Soda (NaOH) and NaCl

: Exercises involving the concentration of industrial chemicals, requiring enthalpy-concentration diagrams or Steam Tables. Educational Resources

While a single "official" standalone solution manual is rare, comprehensive step-by-step guides for Chapter 3 can be found on academic sharing platforms: Studocu - Evaporación Chapter 3

: Provides detailed proposed problems and their resolutions for evaporation. Scribd - Ocon Tojo Vol 1 In the classic chemical engineering text Problemas de

: A digital copy of the book containing the full exercise statements and answers. Scribd - Evaporation Exercises

: Specific solution sets for problems like 3-13 involving NaOH. Restated Result

Chapter 3 of Ocón-Tojo's "Problemas de Ingeniería Química" is dedicated to the study of Evaporation

, specifically focusing on mass/energy balances and heat transfer in simple and multiple-effect systems. step-by-step solution to a specific problem number from this chapter, such as Problem 3.5 or 3.13 Chemical Engineering Process Models | PDF - Scribd

Paso 2 – Etiquetar variables

Asignar nombres (n₁, n₂, x_A, etc.) y unidades (kmol/h, kg/h, fracción molar). Paso 2 – Etiquetar variables Asignar nombres (n₁,

1. What is the Ocon Tojo Solucionario?

  • The Textbook: "Problemas de Ingeniería Química" by Ocon & Tojo is a classic problem book in Spanish-speaking chemical engineering education.
  • The Solution Manual: Provides step-by-step solutions to the end-of-chapter problems.
  • Chapter 3 Focus: Material balances involving stoichiometry, limiting reactants, conversion, yield, selectivity, and purge/recycle streams.

⚠️ Ethical Note: Use the solucionario to check your work and understand methodology, not to copy answers blindly. Your exams will require original problem-solving.

Type C: Recycle + Purge (common in Ocon Tojo)

Example: Ammonia synthesis loop. Steps:

  1. Perform balance around mixing point.
  2. Balance around reactor (with conversion).
  3. Balance around separator.
  4. Balance around purge split.
  5. Solve algebraically (often with recycle ratio).

A Note on Copyright and Academic Integrity

The Problemas de Ingeniería Química (Chemical Engineering Problems) by Ocon & Tojo is a copyrighted textbook widely used in Spanish-speaking engineering schools. A full "solucionario" (solution manual) containing all worked-out answers—especially if distributed without the publisher’s authorization—may violate copyright laws and academic integrity policies.

That said, I can provide you with a comprehensive study guide that describes:

  • The typical contents of Chapter 3 in Ocon & Tojo.
  • The types of problems you will encounter.
  • The general methodologies to solve them.
  • Ethical ways to find or verify solutions.

Below is a long, detailed article structured for students searching for this resource.

1. General Character of the Chapter

Chapter 3 typically tackles steady-state material balances involving chemical reactions, moving beyond the simpler mixing/separation problems of Chapters 1–2. The problems ramp up in complexity: from single-reaction stoichiometry to multiple simultaneous reactions, recycle, purge, and bypass—often with limiting reactants and selectivity/efficiency calculations.

Errores frecuentes y consejos

  • No olvidar unidades al sustituir.
  • Revisar signos al despejar incógnitas.
  • Redondear al final, no durante los pasos intermedios.
  • Dibujar esquemas cuando aplique (diagramas de fuerzas, circuitos, gráficos).

Why Students Desperately Seek the Solucionario

The problems in Chapter 3 are notorious for two reasons: algebraic density and conceptual layering. A single problem might require iterating on the friction factor, converting pressure units, and applying a mass balance simultaneously. The official solucionario serves three critical purposes:

  1. Step-by-Step Logic Checks: Students don't just need the final answer (e.g., "1200 W of power"); they need to see why the solver chose the Fanning friction factor over the Darcy, or how they handled a sudden contraction loss coefficient.
  2. Iteration Mastery: Many problems require guessing a friction factor, calculating velocity, checking Reynolds number, re-guessing, and converging. The solucionario shows the table of iterations—a process often skipped in class due to time constraints.
  3. Unit Conversion Validation: Ocon & Tojo problems mix metric and technical units (kgf/m², m.c.a., atm, kW). The solucionario acts as a cross-check to ensure you converted newtons to kilogram-force correctly.