Curated OER
Catalytic Converter
Two animated slides explain the decomposition reactions that occurs within a catalytic converter. An enthalpy diagram is displayed. Hess's Law is demonstrated. Finally, the analogy of football is used to explain Hess's Law. This clever...
Pingry School
Heat of Reaction and Hess's Law
Melting and burning might seem like opposites, but both exist as common examples of exothermic reactions. Scholars work with three different exothermic chemical reactions to determine the enthalpy changes. They measure and mix chemicals,...
Net Texts
Hess's Law Worksheet
Challenge young scholars' understanding of thermochemistry with this skills-practice learning exercise on Hess's Law. Given a series of five multi-step chemical reactions, students must determine the overall change in entropy for each.
Curated OER
Heat of Formation using Hess's Law Lab
In this heat of formation learning exercise, students determine the heat of formation for magnesium by combining 3 given reactions and using Hess's Law. Students then complete a data calculations chart for each reaction.
Curated OER
Heat of Reaction
In this reactions worksheet, students define enthalpy, heat of formation, and Hess's Law. Students determine how many kilojoules are released during specific reactions. This worksheet has 6 short answer questions and 11 problems to solve.
Curated OER
Challenging Thermodynamics Problems
In this thermodynamics activity, students apply Hess's Law and review internal energy theory and heat capacity theory. Students use Boltzmann formula to calculate entropy and calculate the change in free energy. This activity has 12...
Curated OER
The Enthalpy of Chemical Change
In this chemical change worksheet, students review enthalpy and use Hess's law to calculate enthalpy and the heat of reaction for given reactions. This worksheet has 3 problems to solve.