11. Configurational entropy due to ideal mixing in a binary A - B system is expressed as:
ΔSmix = - R(XA In XA + XB In XB),
where XA and XB are mole fractions of A and B respectively.
ΔSmix is maximum at XA = . . . . . . . .
ΔSmix = - R(XA In XA + XB In XB),
where XA and XB are mole fractions of A and B respectively.
ΔSmix is maximum at XA = . . . . . . . .
12. For the following reactions, the standard free energy change is given at 1773 K as follows:
$$\frac{2}{3}$$ Cr2O2(s) = $$\frac{4}{3}$$ Cr(s) + O2(g)
ΔG° = 447800 J
2H2(g) + O2(g) = 2H2O(g)
ΔG° = - 297000 J
If chromium oxide powder has to be reduced by hydrogen in a fludised bed, the minimum $$\frac{{P{H_2}}}{{P{H_0}}}$$ ratio that has to be maintained at the exit of the reactor is
$$\frac{2}{3}$$ Cr2O2(s) = $$\frac{4}{3}$$ Cr(s) + O2(g)
ΔG° = 447800 J
2H2(g) + O2(g) = 2H2O(g)
ΔG° = - 297000 J
If chromium oxide powder has to be reduced by hydrogen in a fludised bed, the minimum $$\frac{{P{H_2}}}{{P{H_0}}}$$ ratio that has to be maintained at the exit of the reactor is
13. Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm; the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm; the equilibrium constant K is
14. In which of the following reactions, application of vaccum will help?
15. In BOF, desiliconisation is a first order reaction. So, the silicon content of the metal decreases
16. If a multicomponent heterogeneous system at thermodynamic equilibrium, identify the option that need not be true.
17. Reduction of nickel from a solution of hydrogen takes places as:
Ni2+ + H2 = Ni + 2H+
The maximum increase in the reduction rate can be obtained by
Ni2+ + H2 = Ni + 2H+
The maximum increase in the reduction rate can be obtained by
18. The effect of temperature and pressure on chemical equilibrium can be predicted by
19. For any given partial pressure of CO over liquid steel at a constant temperature, the activities of carbon and oxygen in the metal are related to a constant β as
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