Hess's Law Problems & Enthalpy Change

Overview

• Tutorial by The Organic Chemistry Tutor.
• Explains how to solve common Hess's Law problems and calculate enthalpy changes.
• Video views: 1.4M, Uploaded: Sep 22, 2017.

Key Topics

Hess's Law

• Definition: States that the total enthalpy change for a reaction is the same, no matter how many steps the reaction is carried out in.
• Importance in chemistry for calculating reaction enthalpy changes where direct measurement is challenging.

Net Reaction

• Concept: Constructing a net chemical equation by adding multiple reactions.
• Used for calculating the enthalpy change of the net reaction by summing individual reaction enthalpies.

Adding Reactions

• Process: Adjust coefficients and reverse reactions as needed to align with the desired net reaction.
• Important to ensure that all intermediate species cancel out and only desired products and reactants remain.

Example Problems

• Step-by-step walkthrough of example problems applying Hess's Law.
• Emphasis on strategy: reversing reactions, multiplying coefficients, ensuring proper addition.

Additional Resources

• Link to free chemistry formula sheets and thermochemistry video lessons provided.

Viewer Feedback

• Positive comments on clarity and helpfulness of the tutorial.
• Common theme: video provides clearer understanding than traditional classroom lectures.

Conclusion

• Video highly recommended for students struggling with Hess's Law and enthalpy calculations.
• The Organic Chemistry Tutor praised for clear and comprehensive teaching approach.