Gibbs Free Energy

Front

What is Gibbs Free Energy?

Back

Gibbs Free Energy (G) is a thermodynamic potential that measures the maximum reversible work obtainable from a thermodynamic system at constant temperature and pressure.

Front

What does a negative ΔG indicate about a reaction?

Back

A negative ΔG indicates that a reaction is spontaneous under standard conditions.

Front

What does a positive ΔG indicate about a reaction?

Back

A positive ΔG indicates that a reaction is non-spontaneous under standard conditions.

Front

What is the relationship between ΔG, ΔH, and ΔS?

Back

The relationship is given by the equation ΔG = ΔH - TΔS, where ΔG is Gibbs Free Energy, ΔH is enthalpy change, T is temperature in Kelvin, and ΔS is entropy change.

Front

What is the standard state of a substance?

Back

The standard state of a substance is its most stable form at 1 bar of pressure and a specified temperature, usually 25°C.

Front

What is entropy?

Back

Entropy (S) is a measure of the disorder or randomness in a system.

Front

How does temperature affect Gibbs Free Energy?

Back

As temperature increases, the term TΔS becomes more significant, which can affect the spontaneity of a reaction.

Front

What is the significance of ΔH in a reaction?

Back

ΔH represents the change in enthalpy, indicating whether a reaction is exothermic (releases heat) or endothermic (absorbs heat).

Front

What does it mean for a system to reach equilibrium?

Back

A system reaches equilibrium when the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products.

Front

What is the effect of increasing disorder on Gibbs Free Energy?

Back

Increasing disorder (higher entropy) generally leads to a more negative ΔG, favoring spontaneity.