GATE MT 2016 Q32. The change of standard state from pure liquid to 1 wt.% for Si dissolved in liquid Fe at 1873 K is expressed as Si (liq.) = Si (1 wt.%) Given that the activity coefficient of Si at infinite dilution in Fe is 10^-3, the standard Gibbs free energy change (in kJ) for this equilibrium is ______.
GATE MT 2016 Q32. The change of standard state from pure liquid to 1 wt.% for Si dissolved in liquid Fe at 1873 K is expressed as Si (liq.) = Si (1 wt.%) Given that the activity coefficient of Si at infinite dilution in Fe is 10^-3, the standard Gibbs free energy change (in kJ) for this equilibrium is ______.
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Correct answer is in the range of (-168.7 - 168.1) Given reaction, Si (liq.) = Si (1 wt.%) As we know that, ΔG0= -RTln (100Msi/ γsi0MFe) On substitution, ΔG0= -RT ln((100×28)/(10-3×56) =8.314×1873×ln(105/2)= -168.48
Correct answer is in the range of (-168.7 – 168.1)
Given reaction, Si (liq.) = Si (1 wt.%)
As we know that, ΔG0= -RTln (100Msi/ γsi0MFe)
On substitution, ΔG0= -RT ln((100×28)/(10-3×56)
=8.314×1873×ln(105/2)= -168.48
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