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Ch 24: The Second Law of ThermodynamicsWorksheetSee all chapters

# The Carnot Cycle

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Sections
Heat Engines and the Second Law of Thermodynamics
Heat Engines & PV Diagrams
The Otto Cycle
The Carnot Cycle
Refrigerators
Entropy and the Second Law of Thermodynamics
Entropy Equations for Special Processes
Statistical Interpretation of Entropy

Concept #1: The Carnot Cycle and Maximum Theoretical Efficiency

Practice: A theoretical heat engine in space could operate between the Sun's 5500°C surface and the –270.3°C temperature of intergalactic space. What would be its maximum theoretical efficiency?

Practice: A Carnot engine with an efficiency of 70% is cooled by water at 10°C. What temperature must the hot reservoir be maintained at?

Example #1: Lifting Mass with a Heat Engine

Practice: Your friend claims they have a design for a reversible heat engine that can operate between the freezing and boiling temperatures of water that has an efficiency of 30%. Is this possible?