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abi.ayan
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To analyze what does the enthalpy, gibbs free energy and helmholtz free energy are used?What is actually meant by usable energy?
Entropy is a measure of the disorder or randomness of a system. It is a thermodynamic property that increases as the system becomes more disordered.
Enthalpy is a measure of the total energy in a system, including both its internal energy and the energy required to displace its surroundings. Entropy is related to enthalpy through the equation: ΔG = ΔH - TΔS, where ΔG is the change in Gibbs free energy, ΔH is the change in enthalpy, T is temperature, and ΔS is the change in entropy.
Gibbs free energy is a thermodynamic quantity that measures the amount of energy available to do work in a system. It takes into account both the enthalpy and entropy of a system. It is often used to determine whether a chemical reaction will occur spontaneously, with a negative ΔG indicating a spontaneous reaction.
Entropy can technically be decreased in a closed system, but it would require an external energy input and would result in a decrease in the system's enthalpy. In an isolated system, entropy will always increase or remain constant.
Helmholtz free energy is a thermodynamic quantity that measures the amount of energy available to do work at a constant temperature and volume. It is used for systems that are under constant pressure, while Gibbs free energy is used for systems that are under constant pressure and temperature. In other words, Gibbs free energy takes into account both temperature and pressure, while Helmholtz free energy only takes into account temperature.