Gibbs Free Energy Definition and Formula

Questions and Answers

A Gibbs free energy change of zero indicates a process that is at equilibrium. (correct)

A positive Gibbs free energy change (ΔG) indicates a process that is at equilibrium.

A positive Gibbs free energy change (ΔG) indicates a spontaneous process.

A negative Gibbs free energy change (ΔG) indicates a non-spontaneous process.

Always negative

Always positive

Zero (correct)

Can be either positive or negative

Change in enthalpy

Change in entropy

Temperature in Kelvin (correct)

Equilibrium constant

Gibbs free energy is used to drive chemical reactions and maintain cellular processes. Signup and view all the answers

From left to right (forward direction) Signup and view all the answers

It is independent of temperature and pressure. Signup and view all the answers

ΔG is always negative, and ΔH is always negative. Signup and view all the answers

The reaction is spontaneous and releases energy. Signup and view all the answers

Study Notes

Gibbs free energy (G) is a thermodynamic property that measures the energy available to do work at constant temperature and pressure.
It is a state function, meaning that only the change in Gibbs free energy (ΔG) is important, not the absolute value.

The Gibbs free energy change (ΔG) is calculated using the following formula: ΔG = ΔH - TΔS
Where:
- ΔH is the change in enthalpy (heat content)
- T is the temperature in Kelvin
- ΔS is the change in entropy (a measure of disorder or randomness)

At equilibrium, the Gibbs free energy change (ΔG) is zero.
A negative ΔG indicates a spontaneous process, meaning it will proceed on its own.
A positive ΔG indicates a non-spontaneous process, meaning it will not proceed on its own.
A ΔG of zero indicates equilibrium, where the forward and reverse reactions are occurring at the same rate.

ΔG can be used to predict the spontaneity of a reaction.
A negative ΔG indicates that the reaction will proceed from left to right (forward direction).
A positive ΔG indicates that the reaction will proceed from right to left (reverse direction).
ΔG can also be used to calculate the equilibrium constant (K) of a reaction.

Gibbs free energy plays a crucial role in biological systems, where it is used to drive chemical reactions and maintain cellular processes.
In biochemistry, ΔG is often used to study the energetics of enzyme-catalyzed reactions and metabolic pathways.

Gibbs free energy (G) measures the energy available to do work at constant temperature and pressure.
It's a state function, meaning only the change in Gibbs free energy (ΔG) is important.

At equilibrium, ΔG is zero.
A negative ΔG indicates a spontaneous process.
A positive ΔG indicates a non-spontaneous process.
A ΔG of zero indicates equilibrium, where forward and reverse reactions occur at the same rate.

ΔG predicts the spontaneity of a reaction.
A negative ΔG indicates the reaction will proceed from left to right (forward direction).
A positive ΔG indicates the reaction will proceed from right to left (reverse direction).
ΔG can calculate the equilibrium constant (K) of a reaction.

Gibbs free energy drives chemical reactions and maintains cellular processes in biological systems.
In biochemistry, ΔG studies the energetics of enzyme-catalyzed reactions and metabolic pathways.