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Gibbs free energy Video Lecture | Basic Physics for IIT JAM

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FAQs on Gibbs free energy Video Lecture - Basic Physics for IIT JAM

1. What is Gibbs free energy?
Ans. Gibbs free energy, also known as the Gibbs function, is a thermodynamic potential that measures the maximum reversible work that can be performed by a system at constant temperature and pressure. It takes into account both the enthalpy and entropy of a system and is often used to determine whether a reaction will occur spontaneously.
2. How is Gibbs free energy related to spontaneity of a reaction?
Ans. The sign of the Gibbs free energy change (ΔG) determines the spontaneity of a reaction. If ΔG is negative, the reaction is spontaneous and can occur without the input of external energy. If ΔG is positive, the reaction is non-spontaneous and requires an input of energy to occur. If ΔG is zero, the reaction is at equilibrium.
3. What is the significance of Gibbs free energy in chemical equilibrium?
Ans. Gibbs free energy plays a crucial role in understanding chemical equilibrium. At equilibrium, the Gibbs free energy change (ΔG) is zero, indicating that the rates of the forward and reverse reactions are equal. By analyzing the values of ΔG, it is possible to predict the direction in which a reaction will proceed to reach equilibrium.
4. How can Gibbs free energy be calculated?
Ans. The Gibbs free energy change (ΔG) can be calculated using the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy, T is the temperature in Kelvin, and ΔS is the change in entropy. This equation allows us to determine the spontaneity of a reaction and provides valuable information about the energetics of chemical processes.
5. What are the practical applications of Gibbs free energy?
Ans. Gibbs free energy has several practical applications in various fields. It is used in chemical engineering to optimize reaction conditions and design efficient processes. In biochemistry, it helps predict the feasibility of metabolic reactions. Additionally, Gibbs free energy is utilized in the study of phase transitions, such as the formation of crystals or the transition between liquid and gas states.
210 videos|156 docs|94 tests
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