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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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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WEBOct 2, 2012 · 2 Answers. There are two parts to this answer. The first is that the entropy change is defined only for reversible processes. The second is that the entropy is a state function. Many, but not all, the functions in thermodynamics (including the internal energy) are state functions. A state function is one that is independent of path.
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WEBJan 13, 2022 · As a result, a reversible process can change direction at any time, whereas an irreversible process cannot. When a gas expands reversibly against an external pressure such as a piston, for example, the expansion can be reversed at any time by reversing the motion of the piston; once the gas is compressed, it can be allowed to .
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WEBMay 15, 2023 · It is an irreversible chemical reaction where complex substances are broken down into simpler ones. Continue reading to learn about destructive distillation, its process, products, comparison with fractional distillation, and appliions along with FAQs. ... Coal Tar: The process of making coke and coal gas from coal results in the .
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WEB1 / 4. Find stepbystep Physics solutions and your answer to the following textbook question: Give two examples of reversible processes and two examples of irreversible processes in purely mechanical systems, such as blocks sliding on planes, springs, pulleys, and strings. Explain what makes each process reversible or irreversible..
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WEBQuestion: 2. (a) Explain the difference between a reversible and irreversible process in terms of the order of the system before and after the process and give an example of a naturally occurring irreversible event to illustrate your explanation. (6 marks) (b) In a practical thermodynamic cycle, such as a heat pump, the entropy change of ...
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WEBProve that in regards to entropy, the integral of an irreversible process is less than that of a reversible process. True or False, A closed system can experience an increase in entropy only when a net amount of entropy is transferred into the system. The entropy .... in an irreversible cyclic process. A. remains constant B. decreases C. increases
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WEBOur expert help has broken down your problem into an easytolearn solution you can count on. Question: 2) :Give two examples of reversible processes and two examples of irreversible processes in purely mechanical systems, such as blocks sliding on planes, springs, pulleys, and strings. Explain what makes each process reversible or irreversible.
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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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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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WEBMay 13, 2023 · Recognizing that the work done in a reversible process at constant pressure is. wrev = − 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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WEBMay 14, 2018 · 1. For an irreversible expansion process, a crude approximation to the force exerted by the gas on the piston (where the work is done) can be provided by the equation. F A = Pext = nRT V − k V dV dt F A = P e x t = n R T V − k V d V d t. where Pext P e x t is the force per unit area of the piston on the gas and the constant k is ...
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WEBJun 24, 2023 · The combustion of fossil fuels is an example of an irreversible process in nature, as it involves a chemical reaction that permanently changes the composition of the fuel and releases energy that cannot be fully recovered.. When fossil fuels, such as coal or oil, are burned, they undergo a chemical reaction with oxygen in the air, releasing .
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WEBEngineering; Mechanical Engineering; Mechanical Engineering questions and answers; 2. (a) Explain the difference between a reversible and irreversible process in terms of the order of the system before and after the process and give an example of a naturally occurring irreversible event to illustrate your explanation.
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WEBThe process is repeated thereafter. The efficiency of carnot engine, eta is given by eta = dfrac{Q_1 Q_2}{Q_1 ... View Solution. Q2. Explain reversible and irreversible process. Describe the working of Carnot Engine. Obtain an expression for its efficiency. View Solution. Q3. A Carnot engine works between ice point and steam point ...
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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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WEBStep 1. Reversible Process : The system and surroundings can be restored to their initial states ⋅. No energy is dissipated or ... View the full answer Step 2. Unlock. Answer. Unlock. Previous question Next question.
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WEBThe changes in kinetic and potential energies are negligible. Determine: (a) the magnitude and direction of the power during the process; (b) the rate of entropy generation associated with the process; (c) if the process is reversible, irreversible, or impossible. Explain. Answers: (a) MW; (b) kW/K;
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WEBApr 2, 2023 · For an adiabatic process, q=0 by definition, and therefore the difference in the heat evolved in two adiabatic processes is and will always be, Δq = 0, irrespective of whether these are reversible or irreversible. Second, the second law of thermodynamics relates the heat exchanged in a process to the entropy change, with a reversible .
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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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WEBJun 1, 2022 · The novel gasifiionreduction coupling process (GRCP) was proposed to obtain higher coal gas/hot metal polygeneration system efficiency. The hematite particles replaced previous moderators (H 2 O/CO 2) in the entrainedflow gasifiers, and direct reduced iron (DRI) can be obtained this study, the thermodynamic .
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WEBAug 10, 2020 · The coal rank influences how the nitrogen functionality can be modified after the combustion process. The pyrrolicN in anthracite coal might be considered to be the major functional form that directly affects the conversion of nitrogen to NO while both pyrrolicN and pyridinicN in semianthracite were mostly converted into quaternaryN of ...
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WEBMar 18, 2016 · If we follow this game plan for the irreversible process, even if the final pressure matches the value be obtain in the reversible process, the final temperatures and the final volumes will not match. If you would like me to provide a detailed analysis of the irreversible case, illustrating in detail what transpires, I will be glad to do so.
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WEBMay 22, 2019 · A throttling process is a thermodynamic process, in which the enthalpy of the gas or medium remains constant (h = const). In fact, the throttling process is one of isenthalpic processes. During the throttling process no work is done by or on the system (dW = 0), and usually there is no heat tranfer ( adiabatic) from or into the system (dQ = 0).
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WEBOverview: This module uses screencasts and interactive simulations to explain the differences between reversible and irreversible expansion and compression processes. Example problems are provided to allow the user to test themselves. Your retention of material in this module will increase if you write down reasons for your answers to ...
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WEBFeb 15, 2014 · 1 Answer. Spontaneous processes are irreversible because they can be reversed only by taking a different path to get back to their original state. A reversible process can take the same path to return to its original state. An irreversible process must take a different path to get back to its original state. For example, when the .
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WEBDec 3, 2022 · My teacher said that the magnitude of the work done in the reversible process will be more than that done in the irreversible process. The reason behind this, my teacher said, was that the final temperature of irreversible process will always be higher than that of reversible process. But we were not taught why this happens.
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WEBReversible process and consequently reversible cycle is an ideal one. There are no losses in the form of friction, temperature differences for heat transfer to take place. Presence of fraction makes the process mechanically irreversible and the temperature difference for heat transfer during the process makes the process thermally irreversible.
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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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WEBAn irreversible process takes place by which the entropy of the universe increases by J/K. If the temperature of the environment in which the process occurred is 220 K, how much energy (in J) was made unavailable for useful work as a result? Problem 53P: A copper rod of crosssectional area cm2 and length m conducts heat from a ...
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WEBJan 6, 2020 · Environmental Impact Assessment (EIA) is a process of evaluating the likely environmental impacts of a proposed project or development, taking into account interrelated socioeconomic, cultural and humanhealth impacts, both beneficial and adverse. UNEP defines Environmental Impact Assessment (EIA) as a tool used to .
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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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