Maximum work from

Although we can never actually realize the maximum work from a cell reaction, its value is still useful for evaluating the efficiency of a real process based on the cell reaction. For example, suppose a certain galvanic cell has a maximum potential of 2.50 V. In a particular experiment 1.33 moles of electrons passes through this cell at an average actual potential of 2.10 V. The actual work done is... 

How can we get the maximum work from a fuel while producing the least harmful emissions possible ... 

Based on the discussion of the previous section, to obtain the maximum work from an engine operating between fixed temperatures Ti and T2 it is necessary that all processes be carried out reversibly, so that 5gen = 0. In this case... 

The second law of thermodynamics postulates It is impossible for a device operating in a cyclic manner to completely convert heat into work. If the heat flows spontaneously from higher to tower temperature, the opposite process requires a heat engine. Carnot demonstrated that the maximum work from a heat engine is given by a cycle formed by two adiabates and two isotherms whose efficiency is ... 

The concept of maximum work from a chemical reaction is an idealization. In any real situation, less than this maximum work is obtained and some entropy is... 

Bejan, A., and Dan, N. (1997). Maximum work from an electric battery model. Enerev 22,93-102. 

Yan, Z. (2002). A note on maximum work from an electric battery model. 7,... 

The conditions for obtaining the maximum work from water-wheels were identified by the 17th century (see Cardwell, 1971). It was, thus, possible to determine exactly their efficiency. 

We will see in the next two Chapters that Carnot, whose father was a hydraulic engineer, not only was aware of the requirement that for maximum efficiency all the fall of water in a water-wheel must be utilized, but that he used it in establishing the requirement for obtaining the maximum work from a steam engine. 

For the weU-insulated piston-cylinder assembly containing 1 mole of ideal gas described in Problem 2.28, describe the process by which you can obtain the maximum work from the system. Calculate the value for the work. What is the final temperature Why is T lower than that calculated in Problem 2.28 ... 

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