Given an idealgas is expanded adiabatically and irreversibley form volume V_(1) to V_(2)) , then which one of the following is correct ?

Given an idealgas is expanded adiabatically and irreversibley form vol

1.	Given an idealgas is expanded adiabatically and irreversibley form volume V_(1) to V_(2)) , then which one of the following is correct ?
Answer» `DELTAS` ( system ) `= 0 & DeltaS` ( surroundings) `=+ ve` `DeltaS` ( system ) `= +ve & DeltaS` ( surroundings) `=0` `DeltaS` ( system ) `=0 & DeltaS` ( surroundings) `=0` `DeltaS` ( system ) `=+ve & DeltaS` ( surroundings) `=-ve` Solution :For adiabatic process,`q=0`and hence `DeltaS` ( system ) `= 0` . Irrevrsible process is accompaniedby INCREASE of ENTROPY, therefore,`DeltaS` ( SURROUNDING) `= + ve`.