WEBThe point of death of the different cells and organs is not as important as the certainty that the process has become irreversible." The statement had a profound effect on modern medical thinking. "Irreversible loss of function of the organism as a whole" became an accepted clinical criterion of death.
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WEBSection Summary. Entropy is the loss of energy available to do work. Another form of the second law of thermodynamics states that the total entropy of a system either increases or remains constant; it never decreases. Entropy is zero in a reversible process; it increases in an irreversible process.
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WEBScientists. Other. Category. v. t. e. In thermodynamics, a reversible process is a process, involving a system and its surroundings, whose direction can be reversed by infinitesimal changes in some properties of the surroundings, such as pressure or temperature. [1] [2] [3] Throughout an entire reversible process, the system is in thermodynamic ...
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WEBThings or processes which cannot be reversed are called irreversible process. Burning of coal is irreversible as it will not produce coal again. ... Name the process and explain it. ... View Solution. Q5. Assertion :In an irreversible process, finite changes are made; therefore the system is not at equilibrium throughout the process. Reason: An ...
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WEBReversible process: Irreversible process: i. A reversible process is a change that can be retraced in a reverse (opposite) direction. An irreversible process is a change that cannot be retraced in a reverse (opposite) direction. ii. The path of a reversible process is the same in the forward and the reverse direction.
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WEBMechanical Engineering. Mechanical Engineering questions and answers. 8. To determine the entropy change for an irreversible process between states 1 and 2, should the integral be performed along the actual process path or an imaginary reversible path? Explain. Is it possible to create entrony2 Is it possible to destroy it2.
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WEBApr 23, 2019 · This reaction is as follows: ZnO + C → Zn(g) + CO. In this process, reduced iron is obtained by the reaction: FeOt + tC → Fe + tCO (t is oxygen ratio, –).If this treatment is performed efficiently and the energy generated by the production of reduced iron is used effectively, it is possible to reduce the energy used by this treatment and .
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WEBAug 14, 2020 · Recognizing that the work done in a reversible process at constant pressure is w rev = −PΔV, we can express Equation as follows: ΔU = qrev + wrev = TΔS − PΔV. Thus the change in the internal energy of the system is related to the change in entropy, the absolute temperature, and the PV work done.
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WEBJul 6, 2020 · The reason why more work is done in a reversible process than an irreversible process is in an irreversible process entropy is generated within the gas whereas in a reversible process entropy is not generated. That additional entropy has to be transferred to the surroundings in the form of heat, leaving less heat available to be .
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WEBThe daily consumption of coal is calculated using the information that each day there is × 10 14 J of heat transfer from coal. In the combustion process, we have C + O 2 → CO 2. So every 12 kg of coal puts 12 kg + 16 kg + 16 kg = 44 kg of CO 2 into the atmosphere. Solution for Part 3. The daily coal consumption is
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WEBSubstituting this into the equation for Qc/Qh, Q c / Q h, we obtain. Qc Qh = Tc Th. Q c Q h = T c T h. Finally, with Equation, we find that the efficiency of this ideal gas Carnot engine is given by. e = 1 − Tc Th. e = 1 − T c T h. An engine does not necessarily have to follow a Carnot engine cycle.
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WEBWhen examining thermodynamic processes some simplifying assumptions may be applied to help describe and analyse a given system. These simplifiions can be viewed as 'ideal' thermodynamic processes and include adiabatic, isenthalpic, isentropic, isobaric, isochoric, isothermal, isentropic, polytropic and reversible processes. This article provides a brief .
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WEBAug 24, 2019 · The irreversible adiabatic process is carried out similar to irreversible isothermal process by halving the pressure and allowing the gas to expand at constant external pressure. When the process reaches the same volume as the reversible process, state 2, the gas is not yet in equilibrium as its internal pressure is still greater than the ...
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WEBCalculate a change in entropy for an irreversible process of a system and contrast with the change in entropy of the universe; Explain the third law of thermodynamics; ... A coal power plant consumes 100,000 kg of coal per hour and produces 500 MW of power. If the heat of combustion of coal is 30 MJ/kg, what is the efficiency of the power plant?
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WEBJan 30, 2023 · This process continues over and over again, representing a reversible reaction. Unlike irreversible reactions, reversible reactions lead to equilibrium: in reversible reactions, the reaction proceeds in both directions whereas in irreversible reactions the reaction proceeds in only one direction. To learn more about this phenomenon, click .
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WEBFeb 20, 2022 · Irreversible processes involve dissipative factors, such as friction and turbulence. This increases heat transfer (Q_c) to the environment and reduces the efficiency of the engine. ... a tribute to superior engineering. Electrical power stations fired by coal, oil, and natural gas have greater actual efficiencies (about 42%), because their ...
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WEBMar 10, 2019 · A reversible process is a process in which both system and surrounding can be restored to original state after the conclusion of the process, by any means. Now it is obvious that a process which is not reversible is an irreversible process. Practically all the processes are irreversible processes. Causes of irreversibility in a process. Lack .
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WEBNov 19, 2020 · For an irreversible adiabatic process entropy is generated within the system resulting in an increase in the entropy of the system only. An example of an irreversible adiabatic process is the rapid expansion or compression of a gas by a piston in an insulated cylinder such that the gas is not in internal equilibrium during the process.
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WEBJun 14, 2021 · A process that is not reversible is said to be irreversible. We distinguish between two kinds of irreversible processes. A process that cannot occur under a given set of conditions is said to be an impossible process. A process that can occur, but does not do so reversibly, is called a possible process or a spontaneous process.
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WEBOct 19, 2023 · Coal is a black or brownishblack sedimentary rock that can be burned for fuel and used to generate electricity. It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning). Coal is the largest source of energy for generating electricity in the world, and the most abundant fossil fuel ...
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WEBOct 20, 2016 · The heat due to irreversibility is an irreversible process; 2. ... and highlight a new approach to explain the macroscopic irreversibility in thermodynamics, ...
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WEBYour solution's ready to go! Our expert help has broken down your problem into an easytolearn solution you can count on. Question: An ideal gas in thermal contact with the surroundings is cooled in an irreversible process at constant pressure. Are delta S, delta S surroundings, and delta S total, positive, negative, or zero?
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Reversibility and Irreversibility. Reversibility and irreversibility are central concepts of classical thermodynamics. Rigorously speaking, in physics and chemistry all processes are reversible. However, for many chemical processes the probability of the reverse process is negligible. For instance, processes such as the combustion of coal ...
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WEBAn irreversible process is what we encounter in reality almost all the time. The system and its environment cannot be restored to their original states at the same time. Because this is what happens in nature, it is also called a natural process. The sign of an irreversible process comes from the finite gradient between the states occurring in ...
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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