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In the process shown below, which of the following option is correct ? A. `DeltaQ_(AB)=+ve`, `DeltaQ_(BC)=+ve`, `DeltaQ_(CA)=+ve`B. `DeltaQ_(AB)=+ve`, `DeltaQ_(BC)=-ve`, `DeltaQ_(CA)=+ve`C. `DeltaQ_(AB)=+ve`, `C_(BC)=oo`, `(dT)/(dP)=+ve` for `AB`D. `DeltaQ_(AB)=+ve`, `DeltaQ_(BC)=-ve`, `DeltaQ_(CA)=-ve` |
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Answer» For process `AB` `P=(VP_(0))/(V_(0))rArr T=(PV)/(nR)=(P)/(nR)(2V)/(P_(0))` `(dT)/(dP)=(2P)/(nR)(V_(0))/(P_(0))` `(dT)/(dP)=(4V_(0))/(nR)` at `B`. Since `T` goes on increasing, `DeltaW` is positive, `DeltaQ_(AB)=+ve` For `BC` `P(2V_(0))=nRTrArrT=(2PV_(0))/(nR)` `(dT)/(dP)=(2V_(0))/(nR)` at `B` `:. (dT)/(dP)` is not defined at `B`. In `BC` temperature goes on decreasing. `:. DeltaQ_(BC)` is `-ve`. For `CA` `DeltaW= -ve` `:. Q_(CA)=-ve` |
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