Subjects

Chemistry

Physical chemistry

Thermodynamics (a-level only)

How Zinc Carbonate Breaks Down with Gibbs Free Energy!

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How Zinc Carbonate Breaks Down with Gibbs Free Energy!

Aasiyah Rahman

@aasiyahrahman

44 Followers

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 entropy (ΔS)
Reactions are considered feasible when ΔG is negative, while positive values indicate non-feasibility
Temperature plays a crucial role in determining reaction feasibility, with reactions often being feasible only within specific temperature ranges
The zinc carbonate decomposition temperature range demonstrates practical application of these principles
Understanding spontaneity versus feasibility helps distinguish between theoretical possibility and practical occurrence

05/04/2023

Thermodynamics
6 Gibbs Free Energy
KJ MOI" KJ mol" k
K
AGAH-TAS
Change in
Gilolos free charge
energy
find as;
enthalpy temp entropy
Chorge
f

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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.

View

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.

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Page 4: [No content provided for page 4]

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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.

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Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

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Knowunity is the #1 education app in five European countries

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Subjects

Chemistry

Physical chemistry

Thermodynamics (a-level only)

How Zinc Carbonate Breaks Down with Gibbs Free Energy!

Aasiyah Rahman

@aasiyahrahman

44 Followers

Gibbs free energy (ΔG) serves as the key indicator for reaction feasibility, calculated using enthalpy (ΔH) and entropy (ΔS)
Reactions are considered feasible when ΔG is negative, while positive values indicate non-feasibility
Temperature plays a crucial role in determining reaction feasibility, with reactions often being feasible only within specific temperature ranges
The zinc carbonate decomposition temperature range demonstrates practical application of these principles
Understanding spontaneity versus feasibility helps distinguish between theoretical possibility and practical occurrence

05/04/2023

12/13

Chemistry

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.

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.

Page 4: [No content provided for page 4]

Page 1: Understanding Gibbs Free Energy

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.

Can't find what you're looking for? Explore other subjects.

Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

Download in

Google Play

Download in

App Store

4.9+

Average app rating

15 M

Pupils love Knowunity

#1

In education app charts in 12 countries

950 K+

Students have uploaded notes

Still not convinced? See what other students are saying...

iOS User

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user