1.

An ideal mono atomic gas is taken through the cyclic process shown in fig. Linear expansion from A to B following by adiabatic compression back to original state

Answer»

Efficiency of cyclic process is zero
During process A to B heat is released only
During process A to B heat is ABSORBED only
During linear process heat enters and leaves the process

Solution :Since `P_(1)V_(1) gt P_(2)V_(V) rArr T_(A) gt T_(B)` work done is `+ve` and efficiency is positive quantity
`eta = ("work done")/("Heat given") = 1 - (Q_("released"))/(Q_("absorbed"))`
Therefore there MUST be some heat absorbed in theprocess. During adiabatic process `DeltaQ = 0`, therefore during linear process heat will ENTRE and leaves SYSTEM at different times.


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