ENCH291-16S1 (C) Semester One 2016

Mass and Energy Balances

15 points, 0.1250 EFTS
22 Feb 2016 - 26 Jun 2016


An introduction to completing mass and energy balances on systems relevant to process technologies.


Mass Balances (Dr. Gabriel A. Visnovsky)

 Weight volume and molar compositions of gas, liquid and solid mixtures.  Choice of convenient basis for solving problems.

 Material Balances of chemical processes.  Classification of processes.  General material balance equation.  Methods for solving material balances.  Balances on non-reactive systems.

 Material balances on reactive systems.  The chemical equation and stoichiometry.  Yield, Selectivity, Conversion.

 Material Balance of Systems with Chemical Reactor.  Recycle, Bypass and Purge streams.  Solving Material Balances.

 Combustion of Fuels.  Combustion process and terminology.  Excess air and gas analysis.  Material balances for combustion processes.

 Simultaneous equations in mass balances (Dr Aaron Marshall)

Energy Balances (Dr. Aaron Marshall)

 Energy conservation and balance equations

 Energy balances involving temperature change

 Energy balances involving phase changes and steam

 Energy balances involving reactions (isothermal and non-isothermal)

 Simultaneous equations in energy balances

Learning Outcomes

University Graduate Attributes

This course will provide students with an opportunity to develop the Graduate Attributes specified below:


Subject to approval of the Dean of Engineering and Forestry.

Timetable Note

Lectures: Three times a week.  This might change, so make sure you check daily your emails and the online timetable because changes with lectures theaters could happen suddenly according to University needs.

Tutorials: Time and date to be announced during course time according to the class’ needs

Attendance at all lectures is highly encouraged. Completion of all assignments quizzes, tests, and exams is required.

Course Coordinator

Gabriel Visnovsky


Aaron Marshall


Students with concerns about the course should contact any of the lecturers listed above, the 1st Pro Director of Studies (Assoc. Prof. Ken Morison), or the Head of Department (Assoc. Prof. Peter Gostomski)


Assessment Due Date Percentage  Description
Mass Balance Assessments 12% 3 - Due at 1:00 pm on 8th April (2%), 20th May (2%), and 2nd June (8%). Total Mass balance assessments: (12%)
Final Exam 52%
Energy Balances Quizzes 6% 3 online quizzes 13th, 20th, 27th May- 2% each: Total (6%)
Mid Semester Test 25% Mass balances and simultaneous equations
Simultaneous Equations Assignment 05 May 2016 5%

Course policy on collaboration and cheating:

Solving problems in small teams and collaborative learning when working on assignments is encouraged. However direct copying is plagiarism and will result in zero marks for all students involved. When assessment is distributed, you will be instructed whether the assessment is to be submitted for marking individually or as part of a pair/group.
The assignments are mainly a tool to prepare you for the exams.  The advice is to try them individually before collaborating in groups.


Recommended Reading

A. Marshall; Energy balances and Chemical Engineering; (“Energy balances and Chemical Engineering” available from Learn site).

Felder, Richard M.,1939- , Rousseau, Ronald W; Elementary principles of chemical processes; 3rd ed., 2005 ed. with integrated media and study tools; Wiley, 2005.

Smith, J. M.1916- , Van Ness, H. C., Abbott, Michael M; Introduction to chemical engineering thermodynamics; 7th ed; McGraw-Hill, 2005.

Indicative Fees

Domestic fee $901.00

International fee $4,863.00

* Fees include New Zealand GST and do not include any programme level discount or additional course related expenses.

For further information see Chemical and Process Engineering.

All ENCH291 Occurrences

  • ENCH291-16S1 (C) Semester One 2016