Reversible And Irreversible Process In Thermodynamics PdfBy Byron F. In and pdf 23.03.2021 at 23:55 8 min read
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- What are Reversible and Irreversible Processes in Thermodynamics?
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What are Reversible and Irreversible Processes in Thermodynamics?
When the system undergoes a change from its initial state to the final state, the system is said to have undergone a process. During the thermodynamic process, one or more of the properties of the system like temperature, pressure, volume, enthalpy or heat, entropy, etc. The second law of thermodynamics enables us to classify all the processes under two main categories: reversible or ideal processes and irreversible or natural processes. The process in which the system and surroundings can be restored to the initial state from the final state without producing any changes in the thermodynamics properties of the universe is called a reversible process. In the figure below, let us suppose that the system has undergone a change from state A to state B.
Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up. I asked the professor what the issue is with the answer, and she could not articulate a clear reason, and eventually said she'll re-think it. In a reversible process, at each point along the process path, the system is only slightly removed from being in thermodynamic equilibrium with its surroundings. So the path can be considered as a continuous sequence of thermodynamic equilibrium states. For an irreversible process, the system is not close to thermodynamic equilibrium with its surroundings at each point along the path.
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It only takes a minute to sign up. What difference between the two processes in molecular level is responsible for this change? It means an infinitesimal change in something as it undergoes a process. The something of interest here is a thermodynamic state function of a system, its surroundings, or the universe. The change in the universe is the sum of the changes in the system and its surroundings, so only two of the three are independent.
A reversible process involves a series of equilibrium states. Irreversible Process - when the direction of the arrow of time is important. IRREVERSIBILITY DEFINES THE CONCEPT OF TIME. Reversible processes are quasistatic - system is in equilibrium and the trajectory can be drawn on a PV indicator diagram.
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An irreversible process is a process that cannot return both the system and the surroundings to their original conditions. That is, the system and the surroundings would not return to their original conditions if the process was reversed. For example, an automobile engine does not give back the fuel it took to drive up a hill as it coasts back down the hill. There are many factors that make a process irreversible.
In thermodynamics , a reversible process is a process whose direction can be reversed to return the system to its original state by inducing infinitesimal changes to some property of the system's surroundings. Having been reversed, it leaves no change in either the system or the surroundings. Since it would take an infinite amount of time for the reversible process to finish, perfectly reversible processes are impossible. However, if the system undergoing the changes responds much faster than the applied change, the deviation from reversibility may be negligible.
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