For the process
`"Dry ice" to CO_(2)(g)`

Options

A. Both `DeltaH` and `DeltaS` are positive
B. `DeltaH` is -ve while `DeltaS` is positive
C. `DeltaH` is -ve while `DeltaS` is negative
D. Both `DeltaH` and `DeltaS` are negative

Answer

A

Explanation

Dry ice is solid `CO_(2)`
`DeltaH =+ve`, because heat is absorbed during sublimation.
`DeltaS=+ve`, because entropy of gaseous state is more than solids.