Both compartments in the above diagram are larege and contain ideal gas. The initial conditions are mentioned in the diagram. Select the correct statement(s).

Options

A. `DeltaSgt0ifT_(A)gtT_(B)`
B. `DeltaSgt0ifT_(A)ltT_(B)`
C. `DeltaS=0ifT_(A)=T_(B)`
D. `DeltaU=0` no matter what is the relationship between `T_(A)`and`T_(B)`

Answer

A, B, C, D

Explanation

`dS=dS_(A) + dS_(B)`
`(dU_(A))/(T_(A))+(dU_(B))/(T_(B))=(dU_(A))/(T_(A))(dU_(A))/(T_(B))=dU_(A)((1)/(T_(A))-(1)/(T_(B)))`