Ch 21: The Second Law of ThermodynamicsSee all chapters
All Chapters
Ch 01: Units & Vectors
Ch 02: 1D Motion (Kinematics)
Ch 03: 2D Motion (Projectile Motion)
Ch 04: Intro to Forces (Dynamics)
Ch 05: Friction, Inclines, Systems
Ch 06: Centripetal Forces & Gravitation
Ch 07: Work & Energy
Ch 08: Conservation of Energy
Ch 09: Momentum & Impulse
Ch 10: Rotational Kinematics
Ch 11: Rotational Inertia & Energy
Ch 12: Torque & Rotational Dynamics
Ch 13: Rotational Equilibrium
Ch 14: Angular Momentum
Ch 15: Periodic Motion (NEW)
Ch 15: Periodic Motion (Oscillations)
Ch 16: Waves & Sound
Ch 17: Fluid Mechanics
Ch 18: Heat and Temperature
Ch 19: Kinetic Theory of Ideal Gasses
Ch 20: The First Law of Thermodynamics
Ch 21: The Second Law of Thermodynamics
Ch 22: Electric Force & Field; Gauss' Law
Ch 23: Electric Potential
Ch 24: Capacitors & Dielectrics
Ch 25: Resistors & DC Circuits
Ch 26: Magnetic Fields and Forces
Ch 27: Sources of Magnetic Field
Ch 28: Induction and Inductance
Ch 29: Alternating Current
Ch 30: Electromagnetic Waves
Ch 31: Geometric Optics
Ch 32: Wave Optics
Ch 34: Special Relativity
Ch 35: Particle-Wave Duality
Ch 36: Atomic Structure
Ch 37: Nuclear Physics
Ch 38: Quantum Mechanics

Concept #1: The Carnot Cycle and Maximum Theoretical Efficiency

Additional Problems
In each cycle a Carnot heat engine takes in 620 J of heat from the high temperature reservoir that is at 500 K and performs 390 J of mechanical work.a) What is the thermal efficiency of the engine?b) What is the temperature of the low temperature reservoir?c) During one cycle how much heat is rejected into the low temperature reservoir?
The high temperature reservoir of a Carnot engine has a temperature of 227°C and the temperature of the low-temperature reservoir is 17°C. If the engine rejects an amount of heat of magnitude 320 J each cycle, how much mechanical work does the engine perform each cycle?
In one cycle, a Carnot heat engine absorbs 800 J of heat and performs 600 J of work. If the temperature of the high-temperature reservoir is 560 K, what is the temperature of the low temperature reservoir?(a) 140 K(b) 240 K(c) 320 K(d) 420 K(e) none of the above answers
A Carnot heat engine operates between a high-temperature reservoir at TH = 800 K and a low-temperature reservoir at TC = 200 K. In one cycle the engine rejects 400 J of heat energy to the low temperature reservoir. How much work does the engine perform in one cycle?(a) 900 J(b) 1200 J(c) 225 J(d) 300 J(e) 1500 J(f) 2000 J(g) none of the above answers
You want to increase the efficiency of a Carnot engine by altering the temperature of either of the reservoirs by a temperature of ΔT. Which of the following will produce the greatest increase in efficiency?A) Increasing the temperature of the hot reservoir by ΔTB) Increasing the temperature of the cold reservoir by ΔTC) Decreasing the temperature of the hot reservoir by ΔTD) Decreasing the temperature of the cold reservoir by ΔTE) Option A or D, because the temperature change ΔT is the same for either caseF) Option B or C, because the temperature change ΔT is the same for either case