As O_(2) (l)is colled at 1 atm pressure ,it freezes to form solid Iat54.5 K.At a lowertemperature, solid I rearrangesto solid II which has a different crystalstructure. Thermal measurementsshow thatform the phase transition of solidI to solid II, DeltaH =- 743.1J //mol and DeltaS= - 17.0 JK^(-1)mol^(-1).At what temperature aresolidsI andII in equilibrium ?

As O_(2) (l)is colled at 1 atm pressure ,it freezes to form solid Iat5

1.	As O_(2) (l)is colled at 1 atm pressure ,it freezes to form solid Iat54.5 K.At a lowertemperature, solid I rearrangesto solid II which has a different crystalstructure. Thermal measurementsshow thatform the phase transition of solidI to solid II, DeltaH =- 743.1J //mol and DeltaS= - 17.0 JK^(-1)mol^(-1).At what temperature aresolidsI andII in equilibrium ?
Answer» 2.06K 31.5K 43.7 K 53.4 K Solution :For SOLID `I HARR `solid II EUILIBRIUM , `DeltaG=0` . Hence,from `DeltaG= DeltaH-T DeltaS ,0=DeltaH - T DeltaS`or `T= ( DeltaH )/( DeltaS)= ( - 743.15 mol^(-1))/( - 17.0 JK^(-1) mol^(-1))= 43.7 K`