A Thermodynamic Engine Having the Maximum Possible Efficiency Has an Efficiency

question 67

Multiple Choice

A thermodynamic engine having the maximum possible efficiency has an efficiency of 25% when operating between two heat reservoirs.If the temperature of the cold reservoir is 300 K,what is the temperature of the hot reservoir?

• A)350 K
• B)375 K
• C)400 K
• D)450 K
• E)500 K

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Definitions:

Primary Cell

A voltaic cell that cannot be recharged.

Secondary Cell

A voltaic cell that can be recharged.

Cathode

An electrode through which electrons move outward from the source in an electrical device; in a battery, it's the negative electrode.

Voltaic

Pertaining to electricity or electrical phenomena, especially those produced chemically, e.g., in voltaic cells where chemical energy is converted into electrical energy.