A Carnot Refrigerater Runs Between a Cold Reservoir at Temperature $\Delta$

question 27

Multiple Choice

A Carnot refrigerater runs between a cold reservoir at temperature T_C and a hot reservoir at temperature T_H. You want to increase its coefficient of performance. Of the following, which change results in the greatest increase in the coefficient? The value of $\Delta$ T is the same for all changes.

• A) Raise the temperature of the hot reservoir by \(\Delta\)T
• B) Raise the temperature of the cold reservoir by \(\Delta\)T
• C) Lower the temperature of the hot reservoir by \(\Delta\)T
• D) Lower the temperature of the cold reservoir by \(\Delta\)T
• E) Lower the temperature of the hot reservoir by (1/2)\(\Delta\)T and raise the temperature of the cold reservoir by (1/2)\(\Delta\)T

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Definitions:

Hand Antiseptics

Agents applied to the hands to eliminate or reduce harmful microorganisms, enhancing hygiene and preventing infection.

Bacteria

Microscopic single-celled organisms that can be found everywhere and are vital for the environment, but some can cause diseases in humans, animals, and plants.

Antiseptic

Substances used on the skin to inhibit the growth of bacteria, preventing infections.

Medical Asepsis

Involves practices such as hand washing and sanitization that reduce the number and transfer of pathogens.