1. What is Gibbs Free Energy of Products?

Definition: Gibbs Free Energy of Products is the quantitative measure of the energy associated to do work of the products in a chemical reaction of a system.

Purpose: It helps determine the spontaneity of chemical reactions and the maximum reversible work that can be performed by a thermodynamic system.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \Delta G_{products} \) — Gibbs Free Energy of Products (Joules)
• \( \Delta G_{reaction} \) — Gibbs Free Energy of Reaction (Joules)
• \( \Delta G_{reactants} \) — Gibbs Free Energy of Reactants (Joules)

Explanation: The Gibbs free energy of the reaction is added to the Gibbs free energy of the reactants to determine the Gibbs free energy of the products.

3. Importance of Gibbs Free Energy Calculation

Details: Gibbs free energy determines whether a process will occur spontaneously at constant temperature and pressure. Negative ΔG indicates a spontaneous process.

4. Using the Calculator

Tips: Enter the Gibbs free energy values for both the reaction and reactants in Joules. The calculator will sum these values to determine the Gibbs free energy of the products.

5. Frequently Asked Questions (FAQ)

Q1: What are typical values for Gibbs free energy?
A: Values vary widely but are typically in the range of -100 to +100 kJ/mol for most chemical reactions.

Q2: How does temperature affect Gibbs free energy?
A: Gibbs free energy is temperature dependent (ΔG = ΔH - TΔS), where ΔH is enthalpy and ΔS is entropy.

Q3: What does a negative ΔG value mean?
A: A negative ΔG indicates a spontaneous reaction, while positive ΔG indicates non-spontaneous.

Q4: Can Gibbs free energy be zero?
A: Yes, at equilibrium ΔG = 0, meaning the forward and reverse reactions occur at the same rate.

Q5: How is Gibbs free energy related to equilibrium constant?
A: ΔG° = -RT lnK, where R is gas constant, T is temperature, and K is equilibrium constant.