Carnot Theorem
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If the temperature of the cold reservoir in a Carnot engine is decreased while keeping the hot reservoir temperature constant, the efficiency will:
2 / 10
Which of the following is NOT a feature of the Carnot cycle?
Explanation: The Carnot cycle involves isothermal and adiabatic processes, not isobaric (constant pressure) processes.
3 / 10
A Carnot engine absorbs 1000 J of heat from a hot reservoir at 500 K and rejects heat to a cold reservoir at 250 K. How much work does it produce
Explanation: Efficiency η=1−(250/500)=0.5 Work output = η×QH=0.5×1000=500 JÂ
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What is the significance of the Carnot cycle in thermodynamics?
Explanation: The Carnot cycle establishes the maximum possible efficiency for a heat engine operating between two temperatures, serving as a theoretical benchmark.
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According to the Carnot Theorem, why can’t a real heat engine surpass the efficiency of a Carnot engine?
Explanation: Real engines have irreversibilities (e.g., friction, heat transfer across finite temperature differences), which reduce their efficiency below that of the ideal, reversible Carnot engine.
6 / 10
If a Carnot engine operates between 600 K and 300 K, what is its efficiency?
7 / 10
The efficiency of a Carnot engine depends on:
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What is a key requirement for a Carnot engine to achieve maximum efficiency?
Explanation: The Carnot engine requires two constant-temperature reservoirs (hot and cold) and reversible processes to achieve maximum efficiency.
9 / 10
The Carnot cycle consists of which of the following processes?
Explanation: The Carnot cycle comprises two reversible isothermal processes (heat addition and rejection) and two reversible adiabatic (isentropic) processes.
10 / 10
What does the Carnot Theorem state?
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