Carnot Engine Efficiency Concepts

What is the formula used to calculate the maximum efficiency of a Carnot engine?

• 1 - (Tc/Th)

• Th - Tc

• Tc - Th

• Th/Tc

If a Carnot engine absorbs 14,000 joules of heat energy, how much is discarded into the cold reservoir?

• 12,000 joules

• 6,000 joules

• 8,000 joules

• 10,000 joules

How is the mechanical work performed by a Carnot engine calculated?

• Product of Qh and Qc

• Difference between Qh and Qc

• Ratio of Qh to Qc

• Sum of Qh and Qc

What is the efficiency of a non-ideal heat engine if it performs 1,500 joules of work and absorbs 7,500 joules of heat?

• 20%

• 15%

• 25%

• 30%

What is the maximum efficiency of a Carnot engine operating between 300 K and 600 K?

• 30%

• 60%

• 40%

• 50%

How can the efficiency of a Carnot engine be increased?

• Increase the pressure of the system

• Decrease the temperature of the hot reservoir

• Increase the temperature of the cold reservoir

• Decrease the temperature of the cold reservoir

What happens to the efficiency of a Carnot engine if the cold reservoir temperature is decreased?

• Efficiency becomes zero

• Efficiency remains the same

• Efficiency decreases

• Efficiency increases

Which step in the Carnot cycle involves heat energy being absorbed by the system?

• Isothermal expansion

• Adiabatic expansion

• Adiabatic compression

• Isothermal compression

During which step of the Carnot cycle is no heat energy exchanged?

• Adiabatic compression

• Adiabatic expansion

• Isothermal expansion

• Isothermal compression

What is the net work done in a Carnot cycle equal to?

• Area under the PV curve

• Difference between Qh and Qc

• Sum of all work done in each step

• Product of Qh and Qc