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Heat Transfer

why efficienc...

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why efficiency of reversible engine is greater then irreversible engine ?

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Similar questions

Q. The efficiency of the reversible heat engine is

η_{r}

, and that of irreversible heat engine is

η_{i}

.Which of the following relation is correct?

Q. Assertion :Efficiency of a reversible engine is

100

% (maximum) when the temperature of sink is

- 273^{o} C

Reason: Efficiency of engine

η = \frac{T_{2} - T_{1}}{T_{2}}

Q. Assertion :Efficiency of a heat engine can't be greater than efficiency of Carnot's engine. Reason: Efficiency of any engine is never

100 %

.

Q. One reversible heat engine operates between

900 K

T_{2} K

, and another reversible heat engine operates between

T_{2} K

400 K

. If both the engine have the same efficiency, then the temperature

T_{2}

must be equal to

Q. A carnot engine absorbs

760 k J

heat from a source at

380 K

. It rejects
(I)

650 k J

560 k J

of heat to sink at

280 K .

State which of these represent a reversible and irreversible cycle.

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