Chemical Engineering Homework Help with Every Balance Shown

How Chemical Engineering Homework Help Works on Ace My Homework

1. Post your assignment. Upload the problem statement, flowsheet or lab handout with your instructions, course name, textbook edition, deadline and budget. Attach any simulation files or data the work depends on.
2. Compare tutor bids. Tutors who work in chemical engineering send bids. Review their profiles, ratings and reviews, and chat with them before you choose. Ask whether they know your textbook and software version.
3. Pay for the bid you choose and track progress. Message your tutor while the work is underway, send extra files and confirm details such as the basis of calculation or the property method your professor wants.
4. Download, review and request revisions. Check every balance and unit against the instructions. If a step is unclear or something is missing, request a revision so the tutor can fix or explain it.

Courses Covered by Our Chemical Engineering Homework Help

Most homework questions come from the same core courses and textbooks. Tell your tutor which edition you use, because problem numbers and property tables change between editions. For other disciplines, see our engineering homework help page.

Material and Energy Balances

The first course in the major, often called Chemical Process Principles or Material and Energy Balances, usually follows Felder, Rousseau and Bullard, Elementary Principles of Chemical Processes (4th edition). Typical problems involve labeled flowcharts, degree-of-freedom analysis, recycle and purge streams, extent of reaction, combustion with excess air, and energy balances using enthalpy tables and heats of reaction. Many of these problems lean on general chemistry stoichiometry, so our chemistry homework help is useful if moles and limiting reactants still cause trouble.

Chemical Engineering Thermodynamics

Most programs use Smith, Van Ness and Abbott, Introduction to Chemical Engineering Thermodynamics, now in a 9th edition with Swihart as a co-author. Homework covers the first and second laws for open systems, power and refrigeration cycles, equations of state such as Peng-Robinson, fugacity, activity coefficient models such as NRTL, vapor-liquid equilibrium with Raoult's law and the Antoine equation, bubble point, dew point and flash calculations, and reaction equilibrium.

Fluid Mechanics and Transport Phenomena

Fluid mechanics assignments cover the mechanical energy balance, the Reynolds number, friction factors and the Moody chart, pipe networks, pump sizing and net positive suction head, flow meters and flow through packed beds. Graduate-level and honors courses use Bird, Stewart and Lightfoot, Transport Phenomena (2nd edition, revised), where you set up shell balances, apply the equations of change and solve the resulting differential equations for velocity, temperature and concentration profiles. If the calculus is what slows you down, our calculus homework help covers the math these derivations rely on.

Heat and Mass Transfer

Heat transfer problems include conduction with Fourier's law, convection correlations built on the Nusselt, Prandtl and Reynolds numbers, radiation, and heat exchanger design with Q = UAΔT_lm or the effectiveness-NTU method. Bergman, Lavine, Incropera and DeWitt, Fundamentals of Heat and Mass Transfer, is a common text. Mass transfer covers Fick's law, mass transfer coefficients, the Sherwood and Schmidt numbers, and two-film theory.

Separations and Unit Operations

Separations courses use texts such as McCabe, Smith and Harriott, Unit Operations of Chemical Engineering. Distillation problems ask for overall and component balances, McCabe-Thiele diagrams with rectifying and stripping operating lines and a q-line, minimum reflux, the Fenske equation for minimum stages at total reflux, and tray or packing efficiency. The LibreTexts separations handbook is a good free reference for the McCabe-Thiele equations. Other unit operations include gas absorption and stripping, liquid-liquid extraction, adsorption, membranes, crystallization, evaporation and drying.

Reaction Engineering and Reactor Design

Fogler, Elements of Chemical Reaction Engineering (6th edition), is the standard text. Tutors work through mole balances and design equations for batch reactors, CSTRs, plug flow reactors and packed beds, for example V = F_A0X/(−r_A) for a steady-state CSTR. Other topics include rate laws and the Arrhenius equation, stoichiometric tables, reactors in series, multiple reactions and selectivity, non-isothermal reactors, catalysis and Langmuir-Hinshelwood kinetics, the Thiele modulus and residence time distribution. MIT OpenCourseWare's Chemical and Biological Reaction Engineering course has free lecture notes and problem sets on the same material.

Process Control

Process dynamics and control courses often use Seborg, Edgar, Mellichamp and Doyle, Process Dynamics and Control (4th edition). Assignments cover Laplace transforms, transfer functions, first-order and second-order responses, dead time, block diagrams, feedback and feedforward control, PID tuning methods such as Ziegler-Nichols, stability analysis, frequency response with Bode plots and cascade control. Many of these are built and tested in MATLAB and Simulink.

Process Design and Economics

Senior design pulls everything together. Turton and co-authors, Analysis, Synthesis and Design of Chemical Processes (5th edition), covers process flow diagrams, equipment sizing, capital cost estimation with the CAPCOST spreadsheet, cost of manufacturing, cash flow and profitability measures such as net present value, plus heat integration and process safety reviews such as HAZOP. This is where most process engineering homework help requests come from, since a single design project can include a flowsheet, a simulation, an economic analysis and a written report.

Biochemical Engineering Assignment Help

Biochemical and bioprocess engineering courses often use Shuler, Kargi and DeLisa, Bioprocess Engineering: Basic Concepts (3rd edition). Typical problems involve cell growth phases, yield coefficients, enzyme kinetics with the Michaelis-Menten model, and Monod kinetics, where the specific growth rate is μ = μ_maxS/(K_s + S) and K_s is the substrate concentration at which growth reaches half of μ_max. Bioreactor problems cover batch, fed-batch and continuous fermentation, oxygen transfer, sterilization and scale-up. In a chemostat, the dilution rate D is the feed flow rate divided by the culture volume, and at steady state the specific growth rate equals D, as the LibreTexts chemostat case study shows. Downstream processing assignments cover cell disruption, centrifugation, filtration, chromatography and product recovery. For the cell biology behind these problems, see our biology homework help.

Software Tutors Work With

Much of the chemical engineering homework help students request involves software. Tutors list their tool experience on their profiles, and you can confirm it in chat before hiring.

• Aspen Plus for steady-state flowsheets, property method selection, distillation columns with RadFrac, reactors, sensitivity analyses and design specs. Aspen Plus saves document files as .apw and backup files as .bkp, and backup files are the usual way to share a model.
• Aspen HYSYS for hydrocarbon and gas processing simulations, saved as .hsc case files. Tell your tutor the exact release your lab uses, since a case saved in a newer release may not open in an older one.
• MATLAB and Simulink for solving ODE systems, nonlinear equations, regression and control loop models. Our MATLAB assignment help covers code-heavy projects in more depth.
• Polymath, which Fogler's textbook uses for most of its numerical problems, especially its differential equation solver for conversion and temperature profiles in reactors.
• COMSOL Multiphysics for coupled flow, heat transfer and reaction models in two or three dimensions.
• Excel for iterative balances with Goal Seek and Solver, VLE tables, McCabe-Thiele plots and the CAPCOST economics workbook. See our Excel homework help for spreadsheet-focused tasks.

Types of Chemical Engineering Assignments

Chemical engineering assignment help on Ace My Homework covers the formats you are most likely to see in a US program:

• Weekly problem sets from Felder, Fogler, Smith and Van Ness or a course packet, where setup and units are graded as heavily as the final answer.
• Unit operations lab reports on experiments such as distillation columns, heat exchangers, pressure drop in pipes and packed beds, or reactor kinetics. Our guide to lab report format explains the sections most instructors expect.
• Simulation projects that ask you to build and converge a flowsheet in Aspen Plus or HYSYS and report the results.
• Design projects that size a heat exchanger, column or reactor.
• Senior design reports with process flow diagrams, stream tables, equipment specifications, economics and safety analysis.
• Case studies and research papers on topics such as process safety incidents, carbon capture, biofuels or pharmaceutical manufacturing.

Worked Example: Material Balance on a Distillation Column

Here is how a tutor sets out a typical steady-state material balance from a first-year process principles course. Given: a continuous distillation column is fed 180 kmol/h of a benzene-toluene mixture containing 40 mol% benzene. The distillate is 95 mol% benzene and the bottoms product is 5 mol% benzene. Find: the distillate and bottoms flow rates, the component flows in each stream and the fractional recovery of benzene in the distillate.

1. Draw and label the flowchart. One feed stream F = 180 kmol/h with z_F = 0.40, a distillate stream D with x_D = 0.95 and a bottoms stream B with x_B = 0.05. All fractions are mole fractions of benzene, and toluene makes up the rest of each stream.
2. State the assumptions. The column runs at steady state, there is no reaction and there is no accumulation, so input equals output for each species. The basis is 1 hour of operation.
3. Do a degree-of-freedom analysis. There are two unknowns, D and B. With two species, you can write two independent balances. Two unknowns minus two equations leaves zero degrees of freedom, so the problem can be solved.
4. Write the balances symbolically. The total mole balance is F = D + B. The benzene balance is z_FF = x_DD + x_BB.
5. Substitute and solve. From the total balance, B = 180 − D. Substituting into the benzene balance gives 0.40(180) = 0.95D + 0.05(180 − D), which is 72 = 0.90D + 9. So D = 63/0.90 = 70.0 kmol/h and B = 180 − 70.0 = 110.0 kmol/h.
6. Find the component flows. Benzene in the distillate is 0.95 × 70.0 = 66.5 kmol/h, and toluene in the distillate is 3.5 kmol/h. Benzene in the bottoms is 0.05 × 110.0 = 5.5 kmol/h, and toluene in the bottoms is 104.5 kmol/h.
7. Calculate the recovery. The feed carries 0.40 × 180 = 72.0 kmol/h of benzene, so the fractional recovery in the distillate is 66.5/72.0 = 0.924, or 92.4%. Toluene recovery in the bottoms is 104.5/108.0 = 96.8%.
8. Check the result two ways. First, the toluene balance, which was not used to solve the problem, should also close: 0.60 × 180 = 108.0 kmol/h in, and 3.5 + 104.5 = 108.0 kmol/h out. Second, a mass balance using molar masses of 78.11 kg/kmol for benzene and 92.14 kg/kmol for toluene gives a feed of 15,575 kg/h, a distillate of 5,517 kg/h and a bottoms flow of 10,058 kg/h. The two products add up to 15,575 kg/h, so mass is conserved.

The next part of the assignment would usually size the column by choosing a reflux ratio and stepping off stages on a McCabe-Thiele diagram. The pattern stays the same on every balance problem: flowchart, assumptions, degree-of-freedom count, symbolic equations, numbers with units and a check using an equation you did not solve with.

What a Good Chemical Engineering Solution Includes

Chemical engineering instructors grade the method, not just the number in the box. A solution worth studying should have:

• A labeled flowchart or schematic showing every stream, its flow rate and its composition, with unknowns marked clearly.
• A stated basis and stated assumptions, such as steady state, ideal gas behavior, constant molar overflow or negligible kinetic energy changes.
• A degree-of-freedom analysis before any numbers are substituted.
• Equations written symbolically first, then solved, with units carried through each line and consistent significant figures.
• Cited property data, such as steam tables, heat capacity correlations, Antoine constants or the property method used in a simulation.
• An independent check, such as an unused species balance, an overall mass balance or a limiting case.
• Clean simulation deliverables for Aspen or HYSYS work, meaning the model file, a stream table and a short note on the property package and convergence settings.

Can I Pay Someone to Do My Chemical Engineering Homework?

Yes. You can hire a tutor on Ace My Homework to work through a problem set, a reactor design, a simulation or a lab analysis. Tutors provide model solutions and explanations, and you are responsible for using them in line with your school's academic integrity policy. Exams test the same balances and design equations as homework, so chemical engineering homework help works best when you attempt each problem first, compare your setup with the tutor's solution and rework anything you missed. For lab reports, always use the data you collected yourself.

How to Choose the Right Chemical Engineering Tutor

Look for a tutor whose profile lists the specific course you are taking, not just chemistry or general engineering. Read the reviews for comments on clear explanations and correct units. Before you accept a bid, ask a short technical question in chat, such as which property method they would pick for your system or how they would set up the degree-of-freedom count. Their answer tells you more than a profile summary. If you need chemical engineering help with a simulation, confirm they can open files in your software version.

Tips for Doing Chemical Engineering Homework Well

• Draw the flowchart before writing any equations. Most balance errors come from a missing stream or a mislabeled composition.
• Pick a convenient basis. A basis of 100 mol or 100 kg of feed often makes the arithmetic much simpler.
• Count degrees of freedom every time. If the count is not zero, you are missing information or have written a dependent equation.
• Check magnitudes. A recovery above 100% or a negative flow rate means an error upstream.
• Learn the simulator early. Build a simple flash drum or mixer in Aspen Plus in the first weeks of term, before a design project depends on it.

What to Include in Your Chemical Engineering Order

• The full problem statement, including figures, flowsheets and all given values
• The course name, textbook and edition, since problem numbers and property tables vary between editions
• The required solution format and any rubric or grading sheet
• Software name and version, the property method if one is specified, and any starter simulation or data files
• Your own lab data and handout for lab reports
• Your deadline, including time zone, and your budget

Post your problem to get chemical engineering homework help from tutors who list the subject on their profiles, and chat with them before choosing who works on your assignment. If you have questions first, contact support through live chat or at support@acemyhomework.com.