A screencast from Chapter 5 in CH 221 which examines energy changes with a change of state. https://mhchem.org/221/classroom/zAudio/Ch06qChngState.mp4

A screencast from Chapter 5 in CH 221 which introduces enthalpy, (del)H, and how it can assist the chemist. https://mhchem.org/221/classroom/zAudio/Ch06Enthalpy.mp4

A screencast from Chapter 5 in CH 221 which looks at heat of formation values and Hess's Law. https://mhchem.org/221/classroom/zAudio/Ch06HeatFormation1.mp4

A screencast from Chapter 5 in CH 221 which continues to look at the utility of heats of formation for reactions. https://mhchem.org/221/classroom/zAudio/Ch06HeatFormation2.mp4

This is the audio introduction to Chapter Guide Lesson Four (which covers Chapter Four in our textbook) for Chemistry 221. https://mhchem.org/221/classroom/zAudio/Ch04.mp3

This is the video introduction to Chapter Guide Lesson Four (which covers Chapter Four in our textbook) for Chemistry 221. https://mhchem.org/221/classroom/zAudio/CH221CG04.mp4

A screencast from Chapter 4 in CH 221 which looks at the chemical reaction and the features of them. https://mhchem.org/221/classroom/zAudio/Ch04TheReaction.mp4

A screencast from Chapter 4 in CH 221 which discusses techniques used to balance chemical reactions. https://mhchem.org/221/classroom/zAudio/Ch04BalancingEquations.mp4

A screencast from Chapter 4 in CH 221 which looks at theoretical and actual yields (and percent yield as well!) https://mhchem.org/221/classroom/zAudio/Ch04TheoActYields.mp4

A screencast from Chapter 4 in CH 221 which discusses limiting reactants and their meaning in chemistry. https://mhchem.org/221/classroom/zAudio/Ch04LimReac.mp4