Suppose That the Department of Energy Develops a New Reversible

question 66

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
Heat pump. What is its thermal efficiency when operated as a heat engine doing work?

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

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Definitions:

Passion

A strong and barely controllable emotion or enthusiasm for something or about doing something.

Commitment

A pledge or promise to do something or to maintain a course of action, often seen in relationships and personal goals.

Face-to-Face Interaction

Direct communication between two or more individuals in the same physical space.

Exchange Theory

A social theory that suggests human relationships are formed by the use of a subjective cost-benefit analysis and the comparison of alternatives.