jingalala
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Why is the Carnot Cycle The most efficient heat engine?
jingalala replied to Kayra's topic in Physics and Mathematics
we will get 100% efficiency (efficiency= wnet/qin = (qin-qout)/qin = 1-(qout/qin)) when qout=0, but when qout is zero there is no sink which means no gradient (we need gradient in order to flow something either heat or water or electricity). So we will never have 100% efficiency even though it is a reversible engine which is clearly evident from the kelvin Plank statement of 2nd law of thermodynamics.