1. (a) What is the hot reservoir temperature of a Carnot engine that has an efficiency of 47% and a cold reservoir temperature of 30 deg C? °C Th= (b) What must the hot reservoir temperature be for a real heat engine that achieves 0.73 of the maximum efficiency, but still has an efficiency of 47% (and a cold reservoir at 30 deg C)? Th= √°C 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 47% and a cold reservoir temperature of 30 deg C? °C Th= (b) What must the hot reservoir temperature be for a real heat engine that achieves 0.73 of the maximum efficiency, but still has an efficiency of 47% (and a cold reservoir at 30 deg C)? Th= √°C Something to think about: Does your answer imply practical limits to the efficiency of car gasoline engines?
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Transcribed Image Text:1. (a) What is the hot reservoir temperature of a Carnot engine that has an efficiency of 47% and a cold
reservoir temperature of 30 deg C?
Th=
'С
(b) What must the hot reservoir temperature be for a real heat engine that achieves 0.73 of the
maximum efficiency, but still has an efficiency of 47% (and a cold reservoir at 30 deg C)?
√°C
=
Something to think about: Does your answer imply practical limits to the efficiency of car gasoline
engines?
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