1. What is Gibbs Free Energy?

Gibbs Free Energy is a thermodynamic potential that can be used to calculate the maximum of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure.

2. How Does the Calculator Work?

The calculator uses the Gibbs Free Energy formula:

Where:

• \( G \) — Gibbs Free Energy (J)
• \( H \) — Enthalpy (J)
• \( T \) — Temperature (K)
• \( S \) — Entropy (J/K)

Explanation: The formula calculates the maximum reversible work that can be performed by a thermodynamic system at constant temperature and pressure.

3. Importance of Gibbs Free Energy Calculation

Details: Gibbs Free Energy is crucial for determining the spontaneity of chemical reactions and processes. A negative Gibbs Free Energy indicates a spontaneous process, while a positive value indicates a non-spontaneous process.

4. Using the Calculator

Tips: Enter enthalpy in joules (J), temperature in kelvin (K), and entropy in joules per kelvin (J/K). All values must be valid numerical inputs.

5. Frequently Asked Questions (FAQ)

Q1: What does a negative Gibbs Free Energy value indicate?
A: A negative Gibbs Free Energy indicates that the process is spontaneous and can occur without external energy input.

Q2: What are the units for Gibbs Free Energy?
A: Gibbs Free Energy is measured in joules (J) in the SI system.

Q3: How does temperature affect Gibbs Free Energy?
A: Higher temperatures generally make the entropy term (T×S) more significant, which can affect whether a process is spontaneous or not.

Q4: Can Gibbs Free Energy predict reaction rates?
A: No, Gibbs Free Energy indicates whether a reaction is thermodynamically favorable but does not provide information about the reaction rate or kinetics.

Q5: What is the relationship between Gibbs Free Energy and equilibrium?
A: At equilibrium, the Gibbs Free Energy change (ΔG) is zero, meaning no net work can be extracted from the system.