An ice making machine operater with maximum effecieny with the maxumim effecienc

Question

An ice making machine operater with maximum effecieny with the maxumim effeciency allowed by themodaynamic, it takes heat from water at )c and discards heat to a room tem at 22C Suppose that 40 kg of water at ) C are converted to ice at t=0 , howmuch is work done by the machine to accomplish this (Lf 33.4*10^4)

3.65

2.74

1.44

6.5

1

all to the power 10^6 or 7

A heat engine takes heat Qh=8000 from a hot reservior at a tempreture Th=900, does some work W and depost heat Qc=2000 to acold reservior at a tempretre Tc=200K what is the effecieny of the engine, 1/8

1/4

3/8

1/2

3/4

Which describe this problem , The effeciency of the heat engine is --------------- than the maxuimum effeciency allowed by the 2nd thermodynamic law.

Less than

eaqual

greater than

Explanation / Answer

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