1.

As O_(2) is cooled at 1 atm pressure, it freezes to form solid I at 54.5 K. At a lower temperature, solid I rearranges to solid II, which has differentcrystal structure. Thermal measurements show that for the phase transition solid I to solid II, DeltaH=-743.1 J mol^(-1) and DeltaS=-17.0 JK^(-1) mol^(-1). At what temperature are solids I and II in equilibrium

Answer»

2.06 K
31.5 K
43.7 K
53.4 K

Answer :C


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