Interactive Self-Study Module: Energy Balances with Reaction
Overview:
This module uses screencasts and an interactive simulation to explain energy balances in systems with chemical reactions. Your retention of material in this module will increase if you write down reasons for your answers to ConcepTests, questions in screencasts, and questions to answer before using interactive simulations, and you try to solve the example problems before watching the screencast solutions.
We suggest using the learning resources in the following order:
- Attempt to answer the multiple choice ConcepTest and solve the example problem before watching the screencasts or working with the simulation.
- Watch the screencasts that describe energy balances in reactors and answer the questions within the screencasts.
- Review the important equations.
- Use the interactive simulation to further understand the behavior of reactors with heat exchange.
- Try to solve the example problems before watching the solutions in the screencasts.
- Answer the ConcepTests.
- Look at the list of key points, but only after you try to list the key points yourself.
Motivation:
- This module is intended for a material and energy balances course.
Before studying this module, you should be able to:
- Carry out Material Balances.
- Calculate Heats of Reaction from heats of formation.
- Calculate enthalpy due to temperature changes using Heat Capacities.
After studying this module, you should be able to:
- Apply an energy balance to a system with a chemical reaction to determine the amount of heat transfer, the outlet temperature, or the extent of reaction.
- Use one of two approaches for energy balances where reference states are:
- Reactants and products at 25°C, and thus the heat of reaction and extent of reaction are in the energy balance.
- Elements at 25°C and 1 atm, and thus enthalpies and reactants and products appear in the energy balance but heat of reaction does not.