A Heat Engine Performs the Reversible Cycle Abca with 9

question 43

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:

Marginal Rates

The additional cost or benefit associated with a small incremental increase in a unit of activity.

Utilities Possibilities Frontier

A concept in economics that represents all possible allocations of utility or satisfaction among different goods and services for a particular consumer or society, graphically.

Efficient

A state of productivity in which resources are used in the most cost-effective way without waste, achieving the highest possible output from a given input.

Equitable

Characterized by fairness or impartiality; just and right in considering the rights and responsibilities of all parties involved.