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Select the Kelvin-Plank statement of the second law:
- a)an engine cannot produce more heat that the heat it receives.
- b)a refrigerator cannot transfer heat from a low-temperature reservoir to a high temperature reservoir without work.
- c)an engine cannot produce work without discharging heat.
- d)an engine discharges heat if the work is less than the heat it receives.
Correct answer is option 'C'. Can you explain this answer?
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Select the Kelvin-Plank statement of the second law:a)an engine cannot...
The Kelvin-Plank Statement of Second Law
The Kelvin-Plank statement of the second law of thermodynamics states that it is impossible to construct an engine that operates in a cycle and produces no effect other than the absorption of heat from a single reservoir and the performance of an equivalent amount of work. In other words, it is impossible to have a cyclic process in which heat is taken from a single source and converted entirely into work without any heat being rejected to a cooler reservoir. This statement is also known as the heat engine statement of the second law.
Explanation:
The Kelvin-Plank statement explains that a heat engine can never produce work without releasing some amount of heat to a cooler reservoir. This means that in any engine, some amount of heat is always wasted and cannot be converted into work. This is because it is impossible to completely convert heat into work without any loss.
For example, consider a heat engine that takes in heat from a high-temperature reservoir and converts a part of it into work. The remaining heat is released to a low-temperature reservoir. The work produced by the engine is equal to the difference between the heat absorbed and the heat released. Therefore, the efficiency of the engine is always less than 100%.
Conclusion:
In conclusion, the Kelvin-Plank statement of the second law of thermodynamics provides the foundation for the design and operation of heat engines. It sets a limit on the maximum efficiency that can be achieved by an engine and explains why it is impossible to have a cyclic process that converts all the heat into work without any loss.
The Kelvin-Plank statement of the second law of thermodynamics states that it is impossible to construct an engine that operates in a cycle and produces no effect other than the absorption of heat from a single reservoir and the performance of an equivalent amount of work. In other words, it is impossible to have a cyclic process in which heat is taken from a single source and converted entirely into work without any heat being rejected to a cooler reservoir. This statement is also known as the heat engine statement of the second law.
Explanation:
The Kelvin-Plank statement explains that a heat engine can never produce work without releasing some amount of heat to a cooler reservoir. This means that in any engine, some amount of heat is always wasted and cannot be converted into work. This is because it is impossible to completely convert heat into work without any loss.
For example, consider a heat engine that takes in heat from a high-temperature reservoir and converts a part of it into work. The remaining heat is released to a low-temperature reservoir. The work produced by the engine is equal to the difference between the heat absorbed and the heat released. Therefore, the efficiency of the engine is always less than 100%.
Conclusion:
In conclusion, the Kelvin-Plank statement of the second law of thermodynamics provides the foundation for the design and operation of heat engines. It sets a limit on the maximum efficiency that can be achieved by an engine and explains why it is impossible to have a cyclic process that converts all the heat into work without any loss.
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Select the Kelvin-Plank statement of the second law:a)an engine cannot produce more heat that the heat it receives.b)a refrigerator cannot transfer heat from a low-temperature reservoir to a high temperature reservoir without work.c)an engine cannot produce work without discharging heat.d)an engine discharges heat if the work is less than the heat it receives.Correct answer is option 'C'. Can you explain this answer?
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Select the Kelvin-Plank statement of the second law:a)an engine cannot produce more heat that the heat it receives.b)a refrigerator cannot transfer heat from a low-temperature reservoir to a high temperature reservoir without work.c)an engine cannot produce work without discharging heat.d)an engine discharges heat if the work is less than the heat it receives.Correct answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Select the Kelvin-Plank statement of the second law:a)an engine cannot produce more heat that the heat it receives.b)a refrigerator cannot transfer heat from a low-temperature reservoir to a high temperature reservoir without work.c)an engine cannot produce work without discharging heat.d)an engine discharges heat if the work is less than the heat it receives.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select the Kelvin-Plank statement of the second law:a)an engine cannot produce more heat that the heat it receives.b)a refrigerator cannot transfer heat from a low-temperature reservoir to a high temperature reservoir without work.c)an engine cannot produce work without discharging heat.d)an engine discharges heat if the work is less than the heat it receives.Correct answer is option 'C'. Can you explain this answer?.
Select the Kelvin-Plank statement of the second law:a)an engine cannot produce more heat that the heat it receives.b)a refrigerator cannot transfer heat from a low-temperature reservoir to a high temperature reservoir without work.c)an engine cannot produce work without discharging heat.d)an engine discharges heat if the work is less than the heat it receives.Correct answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Select the Kelvin-Plank statement of the second law:a)an engine cannot produce more heat that the heat it receives.b)a refrigerator cannot transfer heat from a low-temperature reservoir to a high temperature reservoir without work.c)an engine cannot produce work without discharging heat.d)an engine discharges heat if the work is less than the heat it receives.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select the Kelvin-Plank statement of the second law:a)an engine cannot produce more heat that the heat it receives.b)a refrigerator cannot transfer heat from a low-temperature reservoir to a high temperature reservoir without work.c)an engine cannot produce work without discharging heat.d)an engine discharges heat if the work is less than the heat it receives.Correct answer is option 'C'. Can you explain this answer?.
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