What is a heat engine? Explain the effic...

What is a heat engine? Explain the efficiency of a heat engine.

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The efficiency of a Carnot heat engine

is independent of the temperature of the source and the sink

is independent of the working substance

can be `10%`

in not affected by the thermal capacity of the source of the sink

A reservoir is at 827^(@)C and Carnot's engine takes a thousand kilocalories of heat from it and exhausts it to a sink at 27^(@)C . What is the amount of work and the efficiency of the engine?

`2.7 xx10^(5)` cal, 70.70%

`2,72 xx 10^(5)`, cal 72.72%

`2.70 xx 10^(5)` cal, 80.70%

`3.70 xx 10^(5)` cal, 70.70%

A : Efficiency of heat engine can neve be 100%. R : Second law of thermodynamics puts a limitaion of the efficiency of a heat engine.

If both Assertion & Reason are true and the reason is the correct explantion of the assertion, then mark(1)

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

If Assertion is true statement but Reason is false, then mark (3).

If both Assertion and Reason are false statements, then mark (4)