Give some examples of reversible processes.

Q: Explain why it is thermodynamically incorrect to say that the refrigerator door must be kept close…

A: In a closed fridge, the heat is removed from the fridge and rejected to the room which increases the…

Q: The change in entropy ih an adiabatic processis equalto Zero if the processisreversible and greater…

A: Any thing in nature is not 100% efficient. Similarly if we give heat to a system all heat energy…

Q: What four processes make up the ideal Otto cycle?

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Q: Why are engineers interested in reversible processes even though they can never be achieved?

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Q: Explain Reversible and Irreversible Processes?

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Q: Does the heat increase entropy of the system?

A: Explanation: Entropy The change in entropy is related to heat. Entropy is a measure of disorder or…

Q: There are various processes that can be occurred in thermodynamic systems such as the isothermal,…

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Q: How does the thermal efficiency of an ideal cycle, in general, compare to that of a Carnot cycle…

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Q: Differentiate between reversible and irreversible processes?

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Q: A heat engine with 100% efficiency is only a theoretical possibility. Explain.

A: Given:  Efficiency = 100 %

Q: The energy output of a heat pump is greater than the energy used to operate the pump. Why doesn’t…

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Q: How is the reversible process different from the thermodynamic process?

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Q: State an example of a process that occurs in nature that is as close to reversible?

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Q: Does the entropy of a system always increase with an increase in temperature?

A: Not always. Entropy of system  increases when heat is transferred. And sometimes temperature can be…

Q: Why is the Carnot cycle not a realistic model for steam power plants?

A: The Carnot cycle is not a realistic model for steam power plants due to the reasons given below.…

Q: It is claimed that, while running through a whole number of cycles, a heat engine takes in 25 kJ of…

A: First law of thermodynamics or law of conservation of energy states that the total energy of an…

Q: Justify the second Law of thermodynamics

A: Explanation: The limitation of the first law of thermodynamics is that it does not say anything…

Q: Distinguish between quasi-static and non-quasi-static processes?

A: The quasi static process is a thermodynamic process, and it occurs slowly enough for the system to…

Q: We ordinarily say that ΔU = 0 for an isothermal process. Does this assume no phase change takes…

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Q: Is it possible for the efficiency of a reversible engine to be greater than 1.0? Is it possible for…

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Q: Calculate the maximum possible efficiency of a heat engine that uses surface lake water at 20.7°C as…

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Q: How could you design a Carnot engine with 100% efficiency?

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Q: Differentiate between Quasi-static and Non-quasi-static Processes?

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Q: The first law of thermodynamics says we can’t get more out of a process than we put in, but the…

A: The first law of thermodynamics says we can’t get more out of a process than we put in, but the…

Q: Entropy is often called “time’s arrow” because it tells usin which direction natural processes…

A: Concept: A capacity to do work is called energy and it may exist in potential, kinetic, thermal,…

Q: would a 100% efficient engine violate the first law of thermodynamics? What about a workless…

A: would a 100% efficient engine violate the first law of thermodynamics? What about a workless…

Q: Is it possible to construct a heat engine that creates no thermal pollution?

A: Heat engine is an engine that takes in energy as heat and partially converts it into other forms…

Q: What is reversible process in thermodynamics?

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Q: Calculate the change in entropy as 0.0929 kg of ice at 273.15 K melts. The latent heat of fusion of…

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Q: Is it theoretically possible to devise a heat engine which will create no thermal pollution?

A: Given:  heat engine with no pollution.

Q: Distinguish between reversible and inrreversible processes.

A: Reversible process are those processes which can be reversed to its initial state, by following the…

Q: In a thermodynamic system the expression for work done at constant pressure and volume change is…

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Q: Why do we study the reversed Carnot cycle even though it is not a realistic model for refrigeration…

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Q: What three different mechanisms can cause the entropy of a control volume to change?

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Q: Calculate the maximum possible efficiency of a heat engine that uses surface lake water at 20.7°C as…

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Q: A heat source generates heat at a rate of 63.0 W (1 W=1 J/s). How much entropy does this produce per…

A: Given:Heat generation rate = 63 W (1 W=1 J/s)Surrounding temp. = 27.2 °CHeat transfer is…

Q: What is the efficiency of carnot engine?

A: The efficiency of a Carnot engine is an ideal concept; it is defined as the maximum efficiency a…

Q: Is an isothermal process necessarily internally reversible? Explain your answer with an example.

A: No, An isothermal process can be irreversible.