As O₂(l)is Cooled at 1 Atm,it Freezes at 54 $\Delta$ H for the I

question 113

Multiple Choice

As O₂(l) is cooled at 1 atm,it freezes at 54.5 K to form Solid I.At a lower temperature,Solid I rearranges to Solid II,which has a different crystal structure.Thermal measurements show that $\Delta$ H for the I $\to$ II phase transition is -743.07 J/mol,and $\Delta$ S for the same transition is -17.0 J/K mol.At what temperature are Solids I and II in equilibrium?

• A)13.6 K
• B)43.7 K
• C)19.8 K
• D)98.2 K
• E)They can never be in equilibrium because they are both solids.

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Definitions:

Discount Rate

The interest rate used to discount future cash flows of a financial instrument, in order to determine its present value.

Salvage Value

The expected end-of-life residual value of an asset.

Net Present Value

Net present value is the calculation to determine the present value of a series of future cash flows minus the initial investment cost, used to assess the profitability of investments.

Net Cash Inflows

The total amount of money received from an investment, project, or business operation, after deducting all associated cash outflows.