A Heat Engine Performs the Reversible Cycle Abca with 9

question 23

Multiple Choice

A heat engine performs the reversible cycle abca with 9.0 moles of an ideal gas,as shown in the figure.Path ca is an adiabatic process.The temperatures at points a and b are 300 K and 500 K,respectively.The volume at point c is 0.20 m³.The adiabatic constant of the gas is 1.60.The thermal efficiency of this engine is closest to

• A)0.070.
• B)0.10.
• C)0.13.
• D)0.16.
• E)0.19.

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Definitions:

MC

Short for Marginal Cost, it refers to the change in total cost that arises when the quantity produced is incremented by one unit.

MR

Marginal Revenue, the additional income that is gained from selling one more unit of a good or service.

Purely Competitive Seller

A seller operating in a market where there are many buyers and sellers, no barriers to entry, and products are homogenous, leading to perfect competition.

Total Fixed Cost

The sum of all costs that do not change with the level of output, such as rent, salaries, and insurance premiums.