MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Internal Energy

The Carnot ef...

Question

The Carnot efficiency of a heat engine is $75$ %.
If heat is taken in at a temperature of $800 K$ , at what temperature is it expelled?

A

600 K

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

1067 K

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

200 K

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

1000 K

No worries! We‘ve got your back. Try BYJU‘S free classes today!

E

100 K

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $200 K$
Temperature of source $T_{H} = 800$ K
Efficiency of the Carnot engine $η = 0.75$
Using $η = 1 - \frac{T_{L}}{T_{H}}$
$∴$ $0.75 = 1 - \frac{T_{L}}{800}$ $⟹ T_{L} = 200$ K

Suggest Corrections

thumbs-up

0

Similar questions

Q. A heat engine works on a carnot cycle with a heat sink at a temperature of

2700 K .

The efficiency of the engine is

10 %

. Determine the temperature of heat source.

Q. An ideal Carnot engine whose efficiency is 40% receives heat at 500 K. If its efficiency were 50%, then in take temperature for same exhaust temperature would be

Q. Two Carnot engines

A

B

are operated in series. Engine

A

receives heat from a reservoir at

600 K

and rejects heat to a reservoir at temperature

T

B

receives heat rejected by engine

A

and in turn rejects it to a reservoir at

100 K

. If the efficiencies of the two engines

A

B

are represented by

η_{A}

η_{B}

, respectively, then what is the value of

\frac{η_{A}}{η_{B}}

?

Q. Two Carnot engines

A

B

are operated in series. Engine

A

receives heat from a reservoir at

600 K

and rejects heat to a reservoir heat to reservoir at temperature

T

B

receives heat rejected by engine

A

and in turn rejects it to a reservoir at

100 K

. If the efficiencies of the two engines

A

B

are represented by

η_{A}

η_{B}

respectively, then what is the value of

\frac{η_{B}}{η_{A}}

Q. A carnot engine, whose efficiency is 40% takes in heat from a source maintained at a temperature of

500 K

. It is desired to have an engine of efficiency 60%. Then, the intake temperature for the same exhaust (sink) must be

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

First Law of Thermodynamics

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Internal Energy

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon