A heat engine operates in a Carnot cycle between 76.0°C and 340°C. It absorbs 20,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 3.00 s. a) What is the mechanical power output of this engine? b) How much energy does it expel in each cycle by heat?

A heat engine operates in a Carnot cycle between 76.0°C and 340°C. It absorbs 20,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 3.00 s. a) What is the mechanical power output of this engine? b) How much energy does it expel in each cycle by heat?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter18: Heat Engines, Entropy, And The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 1P

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Question

A heat engine operates in a Carnot cycle between 76.0°C and 340°C. It absorbs 20,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 3.00 s.

a) What is the mechanical power output of this engine?

b) How much energy does it expel in each cycle by heat?

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Of the following, which is not a statement of the second law of thermodynamics? (a) No heat engine operating in a cycle can absorb energy from a reservoir and use it entirely to do work, (b) No real engine operating between two energy reservoirs can be more efficient than a Carnot engine operating between the same two reservoirs, (c) When a system undergoes a change in state, the change in the internal energy of the system is the sum of the energy transferred to the system by heat and the work done on the system, (d) The entropy of the Universe increases in all natural processes, (e) Energy will not spontaneously transfer by heat from a cold object to a hot object.
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