# PP7 - PP7 CBE 102B Practice Problems 7 Do Not Submit A...

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PP7 CBE 102B Practice Problems 7 Do Not Submit 1. A mixture initially consists of 2 mole of ( ) 4 CH g and 3 mole of . When equilibrium is established at 1000 K and 1 bar, the mixture is found to contain ( ) 2 H O g ( ) 4 g ( ) 2 H O g ( CH , , ) CO g ( ) 2 CO g , , and ( ) 2 g m S 14.98 ln( ) 26.11 10 S T T = − + + 3 monoclinic: 60.88 14.90 ln( ) 29.12 10 m S T T = − + + C H . Find the number of moles and the mixture composition at equilibrium. Assume ideal gas behavior. 2. At 1 atm, rhombic and monoclinic sulfur are at equilibrium at . The molar entropies (in J/mole K) of these two allotropic forms are the following functions of temperature T (in K): o 95.39 C 3 rhombic: 61.13 , m . Find for this allotropic transition at 25 and 1 atm. m G o 3. Consider a two-component system at fixed pressure: (a) Write the Gibbs-Duhem equation for the two-component system at fixed pressure.
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