Entropy Practice
- Grades
- Grades 8–12
- File type
- Microsoft Word
- Editable
- Yes
- Subject
- Chemistry, Science
- Topic
- Entropy, Chemistry Practice
- Resource types
- Activities
- Editable
- Yes
From the author
About this resource
This resource includes 20 problems to review entropy of reactions.
It is expected that students will predict the sign and justify for 10 reactions. Additionally, they will calculate the entropy of 10 reactions using the formula:
ΔS°rxn = ΣΔS°Products - ΣΔS°Reactants.
The answers to each problem are included. Though the document can be edited to meet your lesson's needs.
The values of ΔS° that I used in the key includes ones found online from a standard formation chart. These may show a slight variation from ones you use.
This resource is available in Korean and Spanish!
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In the classroom
Teaching tips & learning objectives
Learning objectives
Predict whether entropy increases or decreases in a reaction and justify the sign
Calculate standard entropy change from tabulated values
Teaching tips
Some calculation problems refer to a standard formation chart that is not fully included, so have a thermodynamic data table ready for students.
Skills covered
Reasoning about disorder — comparing moles of gas and states of matter on each side of a reaction
Thermodynamic calculation — applying the products-minus-reactants formula to given data
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Resource details
Concepts & topics
Core concepts
Core concepts
Entropy
Standard entropy change
Thermodynamics
Topics
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