American Chemical Society
Entropy and Enthalpy Changes
My room isn't messy — it's a scientific experiment in entropy! Scholars investigate entropy, enthalpy, and spontaneity through a guided procedure and set of questions. The lesson connects the Second Law of Thermodynamics, energy transfer...
Curated OER
Chemistry 12 Tutorial 2 - Enthalpy and Entropy
A beautifully designed, eighteen-page chemistry tutorial awaits your learners. The main topics: enthalpy and entropy. By completing this lesson, students will be able to define these concepts, determine whether each is increasing or...
American Chemical Society
Energy and Entropy of a Stretched Rubber Band
Stephen Perry invented and patented the modern rubber band in 1845. Young scientists put his discovery to work as they use rubber bands to observe entropy and enthalpy. They determine the change in free energy to figure out if it...
Curated OER
Enthalpy and Entropy
An entertaining presentation introduces both enthalpy and entropy. It explains equilibrium as the balance between these two measures and provides simple diagrams and graphics for additional clarity.
Curated OER
Enthalpy Calculation Worksheet
In this enthalpy worksheet, students calculate the combustion for propane and find the enthalpy of the reaction. They discuss entropy and free energy.
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Being Spontaneous
In this spontaneous reactions learning exercise, students read about entropy, enthalpy and Gibbs free energy. They complete a table with reaction conditions and determine if the reaction is spontaneous or not. They solve three problems...
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
Entropy and Free Energy
In this entropy worksheet, students define entropy and determine if reactions are exothermic or would occur spontaneously. This worksheet has 10 problems to solve.
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Spontaneity, Disorder and Entropy
In this physical and chemical change worksheet, students calculate the entropy change involved in different chemical changes. This worksheet has 4 problems to solve.
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Entropy
In this entropy worksheet, students calculate the change in entropy and rank absolute molar entropies. This worksheet has 12 problems to solve.
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A Fine Mess
In this enthalpy and entropy activity, high schoolers read about the differences between enthalpy and entropy and answer three critical thinking questions about the reading.
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WS 7.5 Thermodynamics Concepts and Vocabulary
In this thermodynamics worksheet, students fill in the blanks with terms related to specific heat, calorimetry, phase changes, enthalpy, entropy and free energy.
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CHM 152 Thermodynamics (Ch. 16)
In this thermodynamics instructional activity, students answer multiple choice questions about enthalpy and entropy, they calculate molar entropies and they determine equilibrium constants and free energy of reactions.
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2009 U.S. National Chemistry Olympiad National Exam - Part I
The 2009 version of the first part of a national chemistry competition is posted for your use with olympiad hopefuls. Test takers deal with 60 multiple choice questions covering an entire year of chemistry curriculum. Use this to...
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2000 U.S. National Chemistry Olympiad Local Section Exam
This 60-question comprehensive exam was designed to determine who would go on to compete in the 2000 US National Chemistry Olympiad. Hopefuls answer multiple choice questions regarding all chemistry topics taught in the first year...
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2000 U.S. National Chemistry Olympiad National Exam - Part I
The National Chemistry Olympiad exams are comprehensive tests covering an entire year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your general...
Curated OER
2002 U.S. National Chemistry Olympiad National Exam - Part I
As to be expected from the American Chemical Society Olympiad Examinations Task Force, this 60-question test tops the charts in terms of excellence. It consists entirely of multiple choice questions designed to assess a year's worth of...
Curated OER
Chemistry Module 5 - Specifications
While this resource does not provide problems for chemistry learners to solve, it outlines skills that they should have and concepts that they should grasp. Topics include thermodynamics, periodicity, redox equilibria, transition metals,...
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Thermodynamics
In this thermodynamics instructional activity, learners review the first law of thermodynamics and define enthalpy, state functions, and heat capacity. Students use Hess' law and heats of formation to solve reactions. This instructional...
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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...
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Thermodynamics
In this thermodynamics worksheet, students review enthalpy, state functions, bond energy, and heat capacity. This worksheet has 2 multiple choice, 6 matching, and 12 problems to solve.
Curated OER
A Potpourri of Thermo Questions
In this thermodynamics instructional activity, learners match terms to their definitions such as enthalpy, equilibrium, bond energy, and heat capacity. This instructional activity has 20 words to match.
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Thermodynamics
In this thermodynamics worksheet, students calculate the enthalpy change and free energy change for given reactions. students describe what happens to the entropy of a system and describe how its enthalpy changes. This worksheet has 20...
Curated OER
Equilibrium, Enthalpy and Entropy
For this chemical reactions worksheet, learners determine what is true about a system at equilibrium and give examples of macroscopic properties. Students determine minimum enthalpy and maximum entropy for reactions. This worksheet has 2...