What is Carnot's Cycle ? Obtain an expression for the efficiency of Carnot's heat
engine in terms of temperature of the source and the sink.
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Explanation:
Heat engine system is a Carnot engine. It absorbs heat energy (Q1) from a heat source is at a temperature T1. The system performs a useful work W on the surroundings. Then it rejects heat Q2 to the heat sink at a temperature T2.
According to the first law of thermodynamics : ΔQ = ΔU + W
Here, it transforms to Q1 = Q2 + W, as ΔU = 0
The efficiency is defined as useful work performed / heat absorbed
= W/Q1
= (Q1 - Q2)/Q1
= 1 - Q2/Q1
= 1 - T2/T1 (this can be proved by using Entropy principles)
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Answer:
a cycle is completed by the four operation in a definite order. These operations are. represented on th Pv diagram
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