Carnot Engine: One of the Most Efficient Engines Built So

question 25

Essay

Carnot engine: One of the most efficient engines built so far has the following characteristics:
combustion chamber temperature = 1900°C
exhaust temperature = 430°C
7.0 × 10⁹ cal of fuel produces 1.4 × 10¹⁰ J of work in one hour, where 1 cal = 4.19 J
(a) What is the actual efficiency of this engine?
(b) What is the Carnot efficiency of the engine?
(c) What is the power output of this engine?

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Definitions:

Direct Labor-Hour

A measure of the labor time directly involved in producing goods, often used to allocate labor costs to products.

Variable Manufacturing Overhead

Costs in manufacturing that vary with the level of production output, such as utilities and indirect materials.

Selling and Administrative Expense Budget

A financial plan that estimates the costs associated with selling products and managing the business, including marketing, salaries, and office expenses.

Fixed Expenses

Costs that do not fluctuate with the level of production or sales, such as rent, insurance, and salaries.