1. (a) What is the hot reservoir temperature of a Carnot engine that has an efficiency of 43% and a cold reservoir temperature of 29 deg C? °C Th= (b) What must the hot reservoir temperature be for a real heat engine that achieves 0.65 of the maximum efficiency, but still has an efficiency of 43% (and a cold reservoir at 29 deg C)? °C Th= Something to think about: Does your answer imply practical limits to the efficiency of car gasoline engines?

1. (a) What is the hot reservoir temperature of a Carnot engine that has an efficiency of 43% and a cold reservoir temperature of 29 deg C? °C Th= (b) What must the hot reservoir temperature be for a real heat engine that achieves 0.65 of the maximum efficiency, but still has an efficiency of 43% (and a cold reservoir at 29 deg C)? °C Th= Something to think about: Does your answer imply practical limits to the efficiency of car gasoline engines?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter15: Thermodynamics

Section: Chapter Questions

Problem 30PE: (a) What is the hot reservoir temperature of a Carnot engine that has an eficiency of 42.0% and a...

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Question

1. (a) What is the hot reservoir temperature of a Carnot engine that has an efficiency of 43% and a cold
reservoir temperature of 29 deg C?
Th=
°C
(b) What must the hot reservoir temperature be for a real heat engine that achieves 0.65 of the
maximum efficiency, but still has an efficiency of 43% (and a cold reservoir at 29 deg C)?
Th=2886
°C
Something to think about: Does your answer imply practical limits to the efficiency of car gasoline
engines?

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