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A given amount of heat cannot be completely converted into work. However, it is possible to convert a given amount of work completely in heat. This statement results from the
Select one:
Select one:
- a)Second law of thermodynamics
- b)First law of thermodynamics
- c)Zeroth law of thermodynamics
- d)Third law of thermodynamics
Correct answer is option 'A'. Can you explain this answer?
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A given amount of heat cannot be completely converted into work. Howev...
The above statement comes from Kelvin-Plank’s statement of second law of thermodynamics.
The correct answer is: Second law of thermodynamics
The correct answer is: Second law of thermodynamics
Most Upvoted Answer
A given amount of heat cannot be completely converted into work. Howev...
The correct answer is option 'A': Second law of thermodynamics.
Explanation:
The second law of thermodynamics states that it is impossible to convert heat completely into work with 100% efficiency in a cyclic process. This is known as the Kelvin-Planck statement of the second law.
To understand this concept, let's consider a heat engine, which is a device that converts heat into work. According to the first law of thermodynamics, energy is conserved, so the total amount of energy entering the system as heat must be equal to the total amount of energy leaving the system as work and heat.
1. Conversion of heat into work:
When a heat engine operates, it takes in heat from a high-temperature reservoir, performs work, and then releases some waste heat to a low-temperature reservoir. However, not all the heat energy can be converted into work. Some of it will always be lost as waste heat. This is because of the second law of thermodynamics, which states that heat naturally flows from a higher temperature to a lower temperature. Therefore, some heat must be released to the low-temperature reservoir to complete the cycle.
2. Conversion of work into heat:
On the other hand, it is possible to convert a given amount of work completely into heat. This is known as the Joule's law of heating. When an electric current flows through a resistor, the electrical energy is converted into heat energy. This process is highly efficient, and almost all the work done by the electric current is converted into heat.
In summary, the second law of thermodynamics states that it is impossible to convert a given amount of heat completely into work, as some heat will always be lost in a heat engine. However, it is possible to convert a given amount of work completely into heat, as demonstrated by the Joule's law of heating.
Explanation:
The second law of thermodynamics states that it is impossible to convert heat completely into work with 100% efficiency in a cyclic process. This is known as the Kelvin-Planck statement of the second law.
To understand this concept, let's consider a heat engine, which is a device that converts heat into work. According to the first law of thermodynamics, energy is conserved, so the total amount of energy entering the system as heat must be equal to the total amount of energy leaving the system as work and heat.
1. Conversion of heat into work:
When a heat engine operates, it takes in heat from a high-temperature reservoir, performs work, and then releases some waste heat to a low-temperature reservoir. However, not all the heat energy can be converted into work. Some of it will always be lost as waste heat. This is because of the second law of thermodynamics, which states that heat naturally flows from a higher temperature to a lower temperature. Therefore, some heat must be released to the low-temperature reservoir to complete the cycle.
2. Conversion of work into heat:
On the other hand, it is possible to convert a given amount of work completely into heat. This is known as the Joule's law of heating. When an electric current flows through a resistor, the electrical energy is converted into heat energy. This process is highly efficient, and almost all the work done by the electric current is converted into heat.
In summary, the second law of thermodynamics states that it is impossible to convert a given amount of heat completely into work, as some heat will always be lost in a heat engine. However, it is possible to convert a given amount of work completely into heat, as demonstrated by the Joule's law of heating.
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A given amount of heat cannot be completely converted into work. However, it is possible to convert a given amount of work completely in heat. This statement results from theSelect one:a)Second law of thermodynamicsb)First law of thermodynamicsc)Zeroth law of thermodynamicsd)Third law of thermodynamicsCorrect answer is option 'A'. Can you explain this answer?
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