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    Soal Kuis Kimia Fisik II

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    Kestian Pasila
    The document contains 6 questions about physical chemistry concepts: 1. A temperature-composition diagram is to be plotted for an octane-methylbenzene mixture and vapor-liquid compositions calculated. 2. A ternary diagram is to be drawn using composition data for various volcanic rocks. 3. The state of a substance at a given composition is to be identified if heated to 350°C. 4. Thermodynamic values are to be calculated for a dimerization reaction based on equilibrium constants. 5. A suitable reductant is to be identified to extract magnesium from its ore based on an Ellingham diagram. 6. The Gibbs free energy is to be calculated for a hydrogenation reaction to determine

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    Soal Kuis Kimia Fisik II

    Uploaded by

    Kestian Pasila
    77 views1 page
    The document contains 6 questions about physical chemistry concepts: 1. A temperature-composition diagram is to be plotted for an octane-methylbenzene mixture and vapor-liquid compositions calculated. 2. A ternary diagram is to be drawn using composition data for various volcanic rocks. 3. The state of a substance at a given composition is to be identified if heated to 350°C. 4. Thermodynamic values are to be calculated for a dimerization reaction based on equilibrium constants. 5. A suitable reductant is to be identified to extract magnesium from its ore based on an Ellingham diagram. 6. The Gibbs free energy is to be calculated for a hydrogenation reaction to determine

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    The document contains 6 questions about physical chemistry concepts: 1. A temperature-composition diagram is to be plotted for an octane-methylbenzene mixture and vapor-liquid compositions calculated. 2. A ternary diagram is to be drawn using composition data for various volcanic rocks. 3. The state of a substance at a given composition is to be identified if heated to 350°C. 4. Thermodynamic values are to be calculated for a dimerization reaction based on equilibrium constants. 5. A suitable reductant is to be identified to extract magnesium from its ore based on an Ellingham diagram. 6. The Gibbs free energy is to be calculated for a hydrogenation reaction to determine

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    77 views1 page

    Soal Kuis Kimia Fisik II

    Uploaded by

    Kestian Pasila
    The document contains 6 questions about physical chemistry concepts: 1. A temperature-composition diagram is to be plotted for an octane-methylbenzene mixture and vapor-liquid compositions calculated. 2. A ternary diagram is to be drawn using composition data for various volcanic rocks. 3. The state of a substance at a given composition is to be identified if heated to 350°C. 4. Thermodynamic values are to be calculated for a dimerization reaction based on equilibrium constants. 5. A suitable reductant is to be identified to extract magnesium from its ore based on an Ellingham diagram. 6. The Gibbs free energy is to be calculated for a hydrogenation reaction to determine

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
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    Soal Kuis Kimia Fisik II

    Nina Ariesta S.Pd., M.Si.


    1. The following temperature/composition data were obtained for a mixture of octane (O) and
    methylbenzene (M) at 1.00 atm, where x is the mole fraction in the liquid and y the mole fraction
    in the vapour at equilibrium.
    θ /°C 110.9 112.0 114.0 115.8 117.3 119.0 121.1 123.0
    xM 0.908 0.795 0.615 0.527 0.408 0.300 0.203 0.097
    yM 0.923 0.836 0.698 0.624 0.527 0.410 0.297 0.164
    The boiling points are 110.6°C and 125.6°C for M and O, respectively. Plot the
    temperature/composition diagram for the mixture. What is the composition
    of the vapour in equilibrium with the liquid of composition (a) xM = 0.250
    and (b) xO = 0.250?
    2. Draw ternary diagram based on data below:
    The leftcorner of the plot represents 100% (Na2O+K2O). The
    right hand corner reprsents 100% MgO. The top corner
    represents 100% (FeO+Fe2O3). Mark these points on your graph
    and then plot the follwoing data related volcanic rocks.
    (i) 10% (Na2O+K2O), 45% MgO, 45% (FeO+Fe2O3)
    (ii) 10% (Na2O+K2O), 35% MgO, 55% (FeO+Fe2O3)
    (iii) 10% (Na2O+K2O), 25% MgO, 65% (FeO+Fe2O3)
    (iv) 12% (Na2O+K2O), 20% MgO, 68% (FeO+Fe2O3)
    (v) 15% (Na2O+K2O), 15% MgO, 70% (FeO+Fe2O3)
    (vi) 10% (Na2O+K2O), 45% MgO, 45% (FeO+Fe2O3)
    (vii) 18% (Na2O+K2O), 12% MgO, 70% (FeO+Fe2O3)
    (viii) 23% (Na2O+K2O), 12% MgO, 65% (FeO+Fe2O3)
    3. Nyatakan keadaan zat pada komposisi a1 jika dipanaskan hingga suhu 350 oC!
    4. The dimerization of ClO in the Antarctic winter stratosphere is believed to play an important
    part in that region’s severe seasonal depletion of ozone. The following equilibrium constants
    are based on measurements by R.A. Cox and C.A. Hayman (Nature 332, 796 (1988)) on the
    reaction 2ClO (g) →(ClO)2 (g).Determine the values of ΔrHo and ΔrSo for this reaction.
    T/K 233 248 258 268 273 280 288 295 303
    4
    K (.10 ) 41300 5000 1450 537 320 96,2 42,8 16,7 7,02
    5. Berdasarkan diagram Ellingham
    tersebut, perkirakan reduktor yang
    sesuai untuk memisahkan logam Mg
    dari bijihnya. Sertakan reaksinya
    dengan penjelasan tentang harga ΔGo
    6. Determine ΔGo at 25°C for the
    following hydrogenation reaction if
    ΔGof C6H6 124,3 Kj/mol and C6H12
    26,8 kj/mol
    C6H6 (ℓ) + H2 (g) → C6H12 (ℓ).
    Is the reaction spontaneous?

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