Areversible power cycle whose thermal efficiency is 43% receives 50 kj by heat transfer from a hot reservoir at 300oc and rejects energy by heat transfer to a cold reservoir at temperature tc. determine the energy rejected, in kj, and tc, in oc. determine the entropy production for the cycle, σcycle, in kj/k.

To solve this problem it is necessary to take into account the Efficiency values in the energy cycles.

Efficiency can be defined as,

Where,

Q = Heat Exchange

T = Temperature

The efficiency for this system is 0.43 then,

Re-arrange to find

And the temperature would be given as,

The entropy would be given as

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

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