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what is Physical significance of Enthalpy for a process where we don't have pressure constant
The enthalpy is a state function defined in terms of the internal energy and PV. It has no special physical significance, but is very convenient to work with in many kinds of problems. It is particularly convenient for quantifying the effect of temperature on the conditions for phase equilibrium and chemical equilibrium. It is also very convenient to work with in doing energy balances on industrial processing systems operating at steady state, such as chemical reactors, heat exchangers, distillation towers, compressors, absorbers, etc. Please just be patient and, as time progresses, you will get a good appreciation for its utility.Shreyas Samudra said:what is Physical significance of Enthalpy for a process where we don't have pressure constant
Enthalpy is a measure of the total energy of a system. It includes both the internal energy of the system and the work that the system can produce. It is important in science because it helps us understand and predict the behavior of chemical reactions and physical processes.
Enthalpy is directly related to temperature and pressure. As temperature and pressure increase, so does the enthalpy of a system. This is because higher temperatures and pressures allow for more energy to be transferred and stored within the system.
Enthalpy and internal energy are closely related, but they are not the same thing. Enthalpy includes both the internal energy of a system and the work that the system can produce, while internal energy only refers to the total energy of the system.
Enthalpy can be measured experimentally using calorimetry, which involves measuring the heat exchanged between a system and its surroundings. It can also be calculated using the equation: H = U + PV, where H is enthalpy, U is internal energy, P is pressure, and V is volume.
Enthalpy is used in many real-world applications, including chemical reactions, power generation, and refrigeration. It is also important in fields such as thermodynamics, materials science, and environmental science.