Q. What is the efficiency of a carnot engine in which diatomic gas is used. And the gas adiabatically expands in volume from to .

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A

B

C

D

Solution:

For an adiabatic process, relation between and is
constant

Also for a diatomis gas , .
In an adiabatic expansion, temperature decreases. So, is sink temperature and is source temperature.

Efficiency of Carnot cycle is

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