Material and Energy Balances (CHEN20010)

This subject introduces chemical engineering flow sheet calculations, including material balances, energy balances and compositions of mixtures. The concept of conversion of mass is developed as the basis for determining mass flows in chemical processing systems involving chemical reactions and separation systems. Then the concept of conservation of energy is developed as the basis for determining energy flows in and around chemical processing systems, evaluation of enthalpy changes with and without phase change, simplified energy balances for batch, steady-state and adiabatic systems, estimation of heats of reaction, combustion, solution and dilution, energy balances in reacting systems, simultaneous material and energy balances. 

This subject provides the basis for all the chemical engineering subjects that follow. The calculations introduced in this subject are the most common type of calculations performed by professional chemical engineers working in all sectors of industry. 

The teaching of process safety is critical to any undergraduate chemical engineering program. Students need to understand their responsibilities to themselves, their work colleagues and the wider community. They need to be aware of safe practices and also the consequences that may arise when those safe practices are not followed. This subject introduces students to concepts of process safety and the consequences when safety management systems fail.

Please view this video for further information: Material and Energy Balances

Intended learning outcomes

On completion of this subject the student is expected to:

• Apply knowledge of basic science and engineering fundamental concepts to solve material and energy balances;
• Model material and energy flows around non-reacting systems and reacting chemical systems using appropriate digital tools;
• Define and scope engineering problems and formulate suitable strategies for problem solution;
• Explain the importance of safety in the process industries.

Generic skills

• Ability to apply knowledge of basic science and engineering fundamentals
• Ability to undertake problem identification, formulation and solution
• Ability to utilise a systems approach to design and operational performance.