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According to the Clausius statement of the second law:
1. heat flows from cold surface to hot surface, unaided.
2. heat flows from hot surface to cold surface, unaided.
3. heat can flow from cold surface to hot surface with the aid of external work
1. heat flows from cold surface to hot surface, unaided.
2. heat flows from hot surface to cold surface, unaided.
3. heat can flow from cold surface to hot surface with the aid of external work
Which of the above statements is/are correct?
- a)2 only
- b)1 and 3
- c)2 and 3
- d)3 only
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
According to the Clausius statement of the second law:1. heat flows fr...
The correct answer is option 'C' - 2 and 3.
Explanation:
The Clausius statement of the second law of thermodynamics is related to the direction of heat transfer between two bodies. According to this statement, heat flows spontaneously from a hot body to a cold body, and it is impossible for heat to flow spontaneously from a cold body to a hot body. However, it is possible for heat to flow from a cold body to a hot body with the aid of external work.
Let's analyze each statement mentioned in the question:
1. Heat flows from cold surface to hot surface, unaided.
This statement is incorrect according to the Clausius statement of the second law. Heat does not flow spontaneously from a cold surface to a hot surface without any external work being done. It violates the principle of the second law, which states that heat flows spontaneously from a hot body to a cold body.
2. Heat flows from hot surface to cold surface, unaided.
This statement is correct according to the Clausius statement of the second law. Heat flows spontaneously from a hot surface to a cold surface without any external work being done. This is because heat naturally flows from a region of higher temperature to a region of lower temperature.
3. Heat can flow from cold surface to hot surface with the aid of external work.
This statement is also correct according to the Clausius statement of the second law. Although heat does not flow spontaneously from a cold surface to a hot surface, it is possible for heat to flow in this direction with the aid of external work. This can be achieved by using a heat pump or a refrigeration cycle, where work is done to transfer heat from a cold reservoir to a hot reservoir.
In summary, statement 2 and statement 3 are correct according to the Clausius statement of the second law. Heat flows spontaneously from a hot surface to a cold surface, and it is also possible for heat to flow from a cold surface to a hot surface with the aid of external work.
Explanation:
The Clausius statement of the second law of thermodynamics is related to the direction of heat transfer between two bodies. According to this statement, heat flows spontaneously from a hot body to a cold body, and it is impossible for heat to flow spontaneously from a cold body to a hot body. However, it is possible for heat to flow from a cold body to a hot body with the aid of external work.
Let's analyze each statement mentioned in the question:
1. Heat flows from cold surface to hot surface, unaided.
This statement is incorrect according to the Clausius statement of the second law. Heat does not flow spontaneously from a cold surface to a hot surface without any external work being done. It violates the principle of the second law, which states that heat flows spontaneously from a hot body to a cold body.
2. Heat flows from hot surface to cold surface, unaided.
This statement is correct according to the Clausius statement of the second law. Heat flows spontaneously from a hot surface to a cold surface without any external work being done. This is because heat naturally flows from a region of higher temperature to a region of lower temperature.
3. Heat can flow from cold surface to hot surface with the aid of external work.
This statement is also correct according to the Clausius statement of the second law. Although heat does not flow spontaneously from a cold surface to a hot surface, it is possible for heat to flow in this direction with the aid of external work. This can be achieved by using a heat pump or a refrigeration cycle, where work is done to transfer heat from a cold reservoir to a hot reservoir.
In summary, statement 2 and statement 3 are correct according to the Clausius statement of the second law. Heat flows spontaneously from a hot surface to a cold surface, and it is also possible for heat to flow from a cold surface to a hot surface with the aid of external work.
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Community Answer
According to the Clausius statement of the second law:1. heat flows fr...
3 is calusius statement
2 because heat transfer takes place between hot body and body unaidely
but statement 1 cannot happen without supplying external work
2 because heat transfer takes place between hot body and body unaidely
but statement 1 cannot happen without supplying external work
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According to the Clausius statement of the second law:1. heat flows from cold surface to hot surface, unaided.2. heat flows from hot surface to cold surface, unaided.3. heat can flow from cold surface to hot surface with the aid of external workWhich of the above statements is/are correct?a)2 onlyb)1 and 3c)2 and 3d)3 onlyCorrect answer is option 'C'. Can you explain this answer?
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