Chemical Engineering: First-Year Calculations (CIR 113 Pt 2)

Name: Chemical Engineering: First-Year Calculations (CIR 113 Pt 2)
Rating: 5.0 (6 reviews)

Industry examples to practice your Chemical Engineering skills. Learn from an experienced Petrochemical Engineer.

Last updated 1/2025

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What you'll learn

Use mass and mole fractions to describe the concentration of a real-life mixture
Use molarity/ molality/ normality to describe the concentration of real-life mixture
Use parts-per-million (ppm) to describe the concentration of real-life mixture
Create equations to produce a mixture with specific concentrations
Use mass and mole fractions to describe real-life gas mixtures
Calculate the temperature and pressure of gas in a pipeline
Calculate the composition, flowrate and velocity of gas in a pipeline
Complete a mass balance (no reaction) for real-life industrial processes (eg: strawberry jam manufacturing, distillation, filtration and drying)

4 sections • 25 lectures • 7h 19m total length

Q1: Mass and mole fractions9:45
Apply a 100 kg mass basis to a water–salt solution, use a 3:1 mole ratio of NaCl to NaNO3, and determine NaNO3’s mass percentage as 12.07%.
Q2: Normality12:44
Q4: Salt solutions11:35
Solve a salt-solutions concentration problem by applying 30% mass solids and 5% mole NaCl in 100 kg water, using two equations to find NaCl and CuSO4 masses.
Q5: Crystal mixtures19:43
Q6: Parts per million (ppm)5:46

Q1: Mass and molar flowrates (gases)7:38
Q2: Composition of a gas mixture9:19
Solve a methane and ethene gas mixture problem on a mass basis by converting masses to moles and applying carbon and hydrogen balances to find CH4 and C2H4 moles.
Q3: Composition of a gas mixture25:44
Q4: Molar mass of a gas mixture6:34
Q5: Flue gas analysis15:19
Apply the ideal gas law to flue gas with known mole fractions to find density and specific volume, then compute pressure after cooling in a sealed container.
Q6: Gas velocity in a pipeline9:22
Compute gas flow in a nitrogen–oxygen mixture from linear velocity and pipe diameter, convert volumetric flow to molar flow using specific volume and mole fractions, yielding 24.16 tons per hour.
Q7a: Gas cylinders5:15
Q7b: Mole fractions (gases)4:49
Q8: Mixing gas streams28:11
Apply total and component mass balances to mix ideal gas streams A and B with mole fractions 80/20 and 85/15, determining product p's mass, molar flow, and average molar mass.
Q9: Standard conditions (STP)13:55

Q1: Calcium nitrate mixing24:47
Q2: Syngas production32:02
Q3: Distillation17:16
Q4: Distillation33:37
Q5: Crystal recovery (drying of mother liquor)28:32
Learn to apply mass balances to a slurry filtration and drying problem, distinguishing filtrate, filter cake, and mother liquor, and determining sodium chloride and sodium sulfate in the dry product.
Q6: Strawberry jam production19:41
Q7: Crystal recovery (CuSO4)37:56
Q8: Apricot jam production17:32
Q9: Adsorption (through catalytic dehydration)42:17

Requires a good understanding of Grade 12 Mathematics and Physical Science
Should be familiar with basic unit conversions (can be learnt in First-Year Calculations (Part 1) by the same instructor)

Hi, I'm Kaamil the Chemical Engineer.
I currently work as a Process Engineer in a multinational petrochemicals company. It is one of the largest companies by market cap on the Johannesburg Stock Exchange.
This course will teach you typical industry calculations performed by chemical engineers.
The video lectures will help you perform better in your exams, by enhancing your problem-solving capabilities.
Sections covered include:
1. Concentrations of mixtures
2. Ideal gases
3. Mass balances without reaction
You will learn how to set up systems of equations to solve for multiple unknowns, as is often the case in industry when multiple variables exist. This is one of the most important skills to learn as an engineer, since you will be expected to set up systems to solve problems as part of your daily work.
To benefit from this course, you need to have a good understanding of Grade 12 Mathematics and Physical Science. You also need to have a basic knowledge of unit conversions, which I teach in Part 1 (sold as a separate course).
This course is often taught during your first year, second quarter, at university.
If you are a student at the University of Pretoria, this course is relevant for the second half of the CIR 113 module.
All the best on your journey to becoming a great Engineer! Please reach out to me if you have any questions.

First year Chemical Engineering students, looking to practice their skills on real-life examples
CIR 113 students at the University of Pretoria