A comprehensive guide to Gibbs free energy feasibility calculation and ...
Chemistry106 views·Updated 3 Sept 2026·4 pagesHow Zinc Carbonate Breaks Down with Gibbs Free Energy!
Aasiyah Rahman@aasiyahrahman
1 / 4
1
of 4
Page 2: Temperature Effects on Reaction Feasibility
This page explores how temperature affects reaction feasibility through various combinations of enthalpy and entropy values, using the decomposition of zinc carbonate as a practical example.
Example: The decomposition of zinc carbonate (ZnCO₃) to zinc oxide (ZnO) and carbon dioxide (CO₂) demonstrates how temperature influences reaction feasibility.
Highlight: Different combinations of positive and negative ΔH and ΔS values lead to distinct temperature-dependent feasibility patterns.
The page presents a comprehensive table showing how ΔG varies with temperature under different conditions, providing a clear framework for predicting reaction feasibility at various temperatures.
2
of 4
Page 3: Practical Calculations and Applications
This page focuses on practical calculations involving Gibbs free energy and determining specific temperature ranges for reaction feasibility.
Definition: The transition temperature (when ΔG = 0) marks the point where a reaction switches between feasible and non-feasible states.
Example: Calculations show that the zinc carbonate decomposition becomes feasible above 411K, demonstrating the practical application of these principles.
Highlight: The melting point of substances represents a specific case where ΔG = 0, marking the transition to feasibility for the melting process.
The page provides detailed mathematical procedures for calculating transition temperatures and analyzing feasibility at specific temperatures.
3
of 4
Page 4: [No content provided for page 4]
4
of 4
Page 1: Understanding Gibbs Free Energy
This page introduces the fundamental concepts of Gibbs free energy and its relationship to reaction feasibility. The equation ΔG = ΔH - TΔS forms the cornerstone of determining whether reactions can occur spontaneously.
Definition: Gibbs free energy (ΔG) is a thermodynamic quantity that determines reaction feasibility, combining both enthalpy and entropy effects.
Highlight: A negative ΔG indicates a feasible reaction, while a positive ΔG indicates a non-feasible reaction.
Vocabulary: Spontaneous reactions are those that are thermodynamically feasible but may still require activation energy to proceed.
The page emphasizes the importance of unit conversions, particularly from kJ to J (multiplying by 1000) and the significance of temperature in determining reaction feasibility.
We thought you’d never ask...
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Similar content
Most popular content in Chemistry
9Chemistrychem paper 1
higher
112,26446
ChemistryA-level OCR A Chemistry summary sheets
Everything from snaprevise for OCR chemistry a-level
122,44384
ChemistryRedox Reactions Overview
Explore the fundamentals of redox reactions, including oxidation states, definitions of oxidation and reduction, and the roles of oxidizing and reducing agents. This summary covers key rules for determining oxidation states, the concept of disproportionation, and practical applications in chemical equations. Ideal for A-Level Chemistry students preparing for exams.
126,391321
ChemistryAcids, Bases & Salts Overview
Explore the essential concepts of acids, bases, and salts, including acid-base reactions, neutralization processes, and methods for making soluble salts. This summary covers key definitions, pH levels, and indicators, providing a comprehensive understanding for GCSE students. Ideal for exam preparation and quick revision.
1162811
ChemistryBTEC Applied Science Unit 1 Overview
Comprehensive resource for Year 12 students pursuing a Level 3 Diploma in Applied Science. This booklet covers essential topics including cell structure, chemical properties, and wave theory, providing clear explanations and key concepts to aid in your studies and exam preparation.
125,506127
ChemistryIGCSE Chemistry Concepts
Explore essential IGCSE Chemistry concepts including states of matter, chemical bonding, acid-base reactions, and separation methods. This comprehensive summary covers key topics such as ionic and covalent bonds, solubility rules, and the periodic table, tailored for Edexcel IGCSE Double Award students. Perfect for exam preparation and understanding fundamental chemistry principles.
111,45844
ChemistryGCSE Chemistry Essentials
This comprehensive cheat sheet covers key concepts for AQA GCSE Chemistry Paper 1, including acid-base titrations, energy changes, electrochemical cells, and essential chemical calculations. Perfect for quick revision and exam preparation.
114,515166
ChemistryChemical Reactions Overview
Explore the fundamentals of chemical equations, including reactants, products, and the law of conservation of mass. Understand the significance of balancing equations and the role of state symbols. This summary covers atoms, elements, compounds, and the periodic table, providing essential insights for chemistry revision.
102,84594
ChemistryChemistry C1-C3 Overview
Explore key concepts in Chemistry Paper 1, including atomic structure, bonding types, chemical equations, and practical laboratory techniques. This summary covers the law of conservation of mass, separation methods like distillation and chromatography, and acid-base reactions. Ideal for students preparing for OCR Gateway exams.
111,19268
Most popular content
9
SociologySociology of Families: Comprehensive Revision
Dive into an extensive overview of family dynamics, perspectives, and patterns in sociology. This resource covers key concepts such as family diversity, gender roles, marriage, and the impact of social policies on family structures. Perfect for A-Level Sociology students preparing for Paper 2.
1274,0402,306
SociologySociology of Education Overview
Explore comprehensive A-Level Sociology notes on the education system, covering key theories, policies, and sociological perspectives. This resource includes insights on marketisation, gender roles, cultural deprivation, and educational inequalities, providing a thorough understanding of how education shapes social stratification and individual achievement. Ideal for exam preparation and in-depth study.
12103,1973,044
BiologyA-Level Biology Year 1 Overview
Comprehensive summary of AQA A-Level Biology Year 1, covering key topics such as cellular structure, protein synthesis, immune response, gas exchange, and more. Ideal for exam preparation and understanding biological concepts. Includes detailed insights into cellular processes, biological classification, and the circulatory system.
1215,168702
BiologyAQA Biology: Key Concepts
Explore essential AQA Biology topics including Photosynthesis, Respiration, Homeostasis, Genetics, and Ecology. This comprehensive knowledge organizer covers key concepts such as energy transfer, hormonal control, and genetic variation, providing a solid foundation for your studies. Ideal for exam preparation and understanding biological processes.
109,159313
MathsComprehensive Maths Concepts
Explore essential mathematical concepts including powers, geometry, statistics, and probability. This resource features 65 pages of detailed explanations, diagrams, and examples to enhance your understanding of topics such as right triangles, volume calculations, and data representation. Ideal for students seeking to strengthen their numeracy skills and grasp complex mathematical principles.
1180,3336,327
PhysicsPhysics paper 2 notes
physics aqa gcse paper 2 combined higher notes
111,26510
Biologybiology paper 1
all notes
112,60338
English LanguageLanguage Paper 1 Strategies
Master the AQA English Language Paper 1 with this comprehensive guide. Explore key strategies for language and structural analysis, critical evaluation, and creative writing. Learn how to effectively analyze texts, utilize literary techniques, and enhance your writing skills to excel in your exams.
1128,732902
Chemistrychem paper 1
higher
112,26446
Students love us — and so will you.
4.6/5App Store
4.7/5Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan SiOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha KlichAndroid user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
AnnaiOS user
Chemistry106 views·Updated 3 Sept 2026·4 pagesHow Zinc Carbonate Breaks Down with Gibbs Free Energy!
Aasiyah Rahman@aasiyahrahman
A comprehensive guide to Gibbs free energy feasibility calculation and thermodynamics enthalpy entropy reaction concepts, focusing on determining reaction feasibility through temperature variations.
- Gibbs free energy (ΔG) serves as the key indicator for reaction feasibility, calculated using enthalpy (ΔH) and...
1
of 4
Sign up to see the content. It's free!
- Access to all documents
- Improve your grades
- Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Page 2: Temperature Effects on Reaction Feasibility
This page explores how temperature affects reaction feasibility through various combinations of enthalpy and entropy values, using the decomposition of zinc carbonate as a practical example.
Example: The decomposition of zinc carbonate (ZnCO₃) to zinc oxide (ZnO) and carbon dioxide (CO₂) demonstrates how temperature influences reaction feasibility.
Highlight: Different combinations of positive and negative ΔH and ΔS values lead to distinct temperature-dependent feasibility patterns.
The page presents a comprehensive table showing how ΔG varies with temperature under different conditions, providing a clear framework for predicting reaction feasibility at various temperatures.
2
of 4Sign up to see the content. It's free!
- Access to all documents
- Improve your grades
- Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Page 3: Practical Calculations and Applications
This page focuses on practical calculations involving Gibbs free energy and determining specific temperature ranges for reaction feasibility.
Definition: The transition temperature (when ΔG = 0) marks the point where a reaction switches between feasible and non-feasible states.
Example: Calculations show that the zinc carbonate decomposition becomes feasible above 411K, demonstrating the practical application of these principles.
Highlight: The melting point of substances represents a specific case where ΔG = 0, marking the transition to feasibility for the melting process.
The page provides detailed mathematical procedures for calculating transition temperatures and analyzing feasibility at specific temperatures.
3
of 4Sign up to see the content. It's free!
- Access to all documents
- Improve your grades
- Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Page 4: [No content provided for page 4]
4
of 4Sign up to see the content. It's free!
- Access to all documents
- Improve your grades
- Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Page 1: Understanding Gibbs Free Energy
This page introduces the fundamental concepts of Gibbs free energy and its relationship to reaction feasibility. The equation ΔG = ΔH - TΔS forms the cornerstone of determining whether reactions can occur spontaneously.
Definition: Gibbs free energy (ΔG) is a thermodynamic quantity that determines reaction feasibility, combining both enthalpy and entropy effects.
Highlight: A negative ΔG indicates a feasible reaction, while a positive ΔG indicates a non-feasible reaction.
Vocabulary: Spontaneous reactions are those that are thermodynamically feasible but may still require activation energy to proceed.
The page emphasizes the importance of unit conversions, particularly from kJ to J (multiplying by 1000) and the significance of temperature in determining reaction feasibility.
We thought you’d never ask...
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Similar content
Most popular content in Chemistry
9Chemistrychem paper 1
higher
112,26446
ChemistryA-level OCR A Chemistry summary sheets
Everything from snaprevise for OCR chemistry a-level
122,44384
ChemistryRedox Reactions Overview
Explore the fundamentals of redox reactions, including oxidation states, definitions of oxidation and reduction, and the roles of oxidizing and reducing agents. This summary covers key rules for determining oxidation states, the concept of disproportionation, and practical applications in chemical equations. Ideal for A-Level Chemistry students preparing for exams.
126,391321
ChemistryAcids, Bases & Salts Overview
Explore the essential concepts of acids, bases, and salts, including acid-base reactions, neutralization processes, and methods for making soluble salts. This summary covers key definitions, pH levels, and indicators, providing a comprehensive understanding for GCSE students. Ideal for exam preparation and quick revision.
1162811
ChemistryBTEC Applied Science Unit 1 Overview
Comprehensive resource for Year 12 students pursuing a Level 3 Diploma in Applied Science. This booklet covers essential topics including cell structure, chemical properties, and wave theory, providing clear explanations and key concepts to aid in your studies and exam preparation.
125,506127
ChemistryIGCSE Chemistry Concepts
Explore essential IGCSE Chemistry concepts including states of matter, chemical bonding, acid-base reactions, and separation methods. This comprehensive summary covers key topics such as ionic and covalent bonds, solubility rules, and the periodic table, tailored for Edexcel IGCSE Double Award students. Perfect for exam preparation and understanding fundamental chemistry principles.
111,45844
ChemistryGCSE Chemistry Essentials
This comprehensive cheat sheet covers key concepts for AQA GCSE Chemistry Paper 1, including acid-base titrations, energy changes, electrochemical cells, and essential chemical calculations. Perfect for quick revision and exam preparation.
114,515166
ChemistryChemical Reactions Overview
Explore the fundamentals of chemical equations, including reactants, products, and the law of conservation of mass. Understand the significance of balancing equations and the role of state symbols. This summary covers atoms, elements, compounds, and the periodic table, providing essential insights for chemistry revision.
102,84594
ChemistryChemistry C1-C3 Overview
Explore key concepts in Chemistry Paper 1, including atomic structure, bonding types, chemical equations, and practical laboratory techniques. This summary covers the law of conservation of mass, separation methods like distillation and chromatography, and acid-base reactions. Ideal for students preparing for OCR Gateway exams.
111,19268
Most popular content
9SociologySociology of Families: Comprehensive Revision
Dive into an extensive overview of family dynamics, perspectives, and patterns in sociology. This resource covers key concepts such as family diversity, gender roles, marriage, and the impact of social policies on family structures. Perfect for A-Level Sociology students preparing for Paper 2.
1274,0402,306
SociologySociology of Education Overview
Explore comprehensive A-Level Sociology notes on the education system, covering key theories, policies, and sociological perspectives. This resource includes insights on marketisation, gender roles, cultural deprivation, and educational inequalities, providing a thorough understanding of how education shapes social stratification and individual achievement. Ideal for exam preparation and in-depth study.
12103,1973,044
BiologyA-Level Biology Year 1 Overview
Comprehensive summary of AQA A-Level Biology Year 1, covering key topics such as cellular structure, protein synthesis, immune response, gas exchange, and more. Ideal for exam preparation and understanding biological concepts. Includes detailed insights into cellular processes, biological classification, and the circulatory system.
1215,168702
BiologyAQA Biology: Key Concepts
Explore essential AQA Biology topics including Photosynthesis, Respiration, Homeostasis, Genetics, and Ecology. This comprehensive knowledge organizer covers key concepts such as energy transfer, hormonal control, and genetic variation, providing a solid foundation for your studies. Ideal for exam preparation and understanding biological processes.
109,159313
MathsComprehensive Maths Concepts
Explore essential mathematical concepts including powers, geometry, statistics, and probability. This resource features 65 pages of detailed explanations, diagrams, and examples to enhance your understanding of topics such as right triangles, volume calculations, and data representation. Ideal for students seeking to strengthen their numeracy skills and grasp complex mathematical principles.
1180,3336,327
PhysicsPhysics paper 2 notes
physics aqa gcse paper 2 combined higher notes
111,26510
Biologybiology paper 1
all notes
112,60338
English LanguageLanguage Paper 1 Strategies
Master the AQA English Language Paper 1 with this comprehensive guide. Explore key strategies for language and structural analysis, critical evaluation, and creative writing. Learn how to effectively analyze texts, utilize literary techniques, and enhance your writing skills to excel in your exams.
1128,732902
Chemistrychem paper 1
higher
112,26446
Students love us — and so will you.
4.6/5App Store
4.7/5Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan SiOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha KlichAndroid user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
AnnaiOS user