Suppose That the Department of Energy Develops a New Reversible

question 2

Multiple Choice

Suppose that the Department of Energy develops a new reversible engine that has a coefficient of performance (COP) of 4.0 when operated as a refrigerator and a COP of 5.0 when operated as a thermodynamic pump.What is its thermal efficiency when operated as a thermodynamic engine doing work?

• A)10%
• B)20%
• C)25%
• D)45%
• E)80%

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Definitions:

Valles Marineris

A vast canyon system on the surface of Mars, stretching about 4,000 kilometers and reaching depths of up to 7 kilometers, making it one of the largest canyon systems in the solar system.

Erosion

The process by which soil and rock are removed from the Earth's surface by natural processes such as wind or water flow, and then transported and deposited in other locations.

Methane

A potent greenhouse gas with a chemical formula CH4, produced by anaerobic decomposition of organic materials and other processes.

Ammonia

A compound of nitrogen and hydrogen with the formula NH3, known for its pungent smell and used in various industrial processes.