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Black-Body Radiation

For a carnot ...

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For a carnot engine operating between 27°c and 327°c. i) Calculate heat rejected for each joule of work done. ii) Also calculate change in temperature of source to reduce the efficiency by 20%.

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A Carnot engine is operated between 2 resovoirs at temperature 177°C and 77°C. If the engine recieves 4200J of heat energy from the source in each cycle, calculate the amount of heat rejected to the sink in each cycle. Calculate the efficiency of engine.

Q. A carnot engine absorbs 1000 J of heat energy from a reseruoire at

127^{\circ} C

and reject 600 J of heat energy during each cycle of calculate
(i) Efficiency of engine
(ii) Temperature of sink

T_{2}

(iii) amount of useful work done bar

Q. A carnot engine operates between

327^{o} C

27^{o} C

. How much heat (in joules) does it take from the

327^{o} C

reservoir for every 100 J of work done?

Q. A carnot engine, efficiency

40

% and temperature of sink

300 K

to increase efficiency up to

60

% calculate change in temperature of source.

Q. Two Carnot engines

A

B

are operated in series. The first one

A

receives heat from a source at temperature

800 K

and rejects heat to a reservoir at temperature

T K

. The second engine

B

receives the heat rejected by the first engine and in turn rejects to a heat reservoir at temperature

300 K

Find the value of temperature

T

if the efficiencies of two engines are equal.
(Take

\sqrt{6} = 2.45

for calculation)

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