An Electrical Generating Plant Operates at a Boiler Temperature of 200

question 21

Multiple Choice

An electrical generating plant operates at a boiler temperature of 200 $\degree$ C and exhausts the unused heat into a nearby river at 20 $\degree$ C. What is the maximum theoretical efficiency of the plant? (0 $\degree$ C = 273 K)

• A) 61%
• B) 38%
• C) 21%
• D) 41%

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Definitions:

Avogadro's Number

The number of units in one mole of any substance (defined as its molecular weight in grams), approximately 6.022 x 10^23 units.

Mass

A measure of the amount of matter that an object contains, often expressed in kilograms or grams.

Mole

A unit in chemistry used to express amounts of a chemical substance, defined as containing exactly 6.02214076×10²³ particles, such as atoms or molecules.

S Atoms

Sulfur atoms, which are nonmetallic elements with the atomic number 16 known for their yellow crystals and role in biological systems.