The oxidation reaction lines of metals/nonmetals parallel to x- axis in Ellingham diagram is corresponds to
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Metallurgical Engineering · all questionsMetallurgical Thermodynamics and Kinetics
Metallurgical Thermodynamics and Kinetics
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What is the temperature range for CO where it can act as reducing agent for iron oxide reduction
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The activity of pure hydrogen gas at 1000°C and 5 atm. pressure.
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If two system P & Q are in thermal equi librium with a third system M, then P and Q will also be in thermal equilibrium with each other. This is following . . . . . . . . law of thermodynamics.
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As the temperature increases, the solubility of gas in molten metal . . . . . . . . at constant pressure
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A chemical reaction whose rate does not depend on concentration of reactants is called
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If k is the rate constant for a reaction and T is the absolute temperature in the given figure, the activation energy for the reaction is . . . . . . . . J/K mole.
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The erder of a chemical reaction
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In reaction equilibria occuring between pure condensed phases and a gas phase, the equilibrium constant, K
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When one mole of the substance is completely burnt in oxygen. The heat evolve is known
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If 'Δx' represents adherent oxide layer thickness and 't' is time, which of the following curves represents diffusion controlled oxidation kinetics?
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The reduction of FeO with CO gas in co-current flow is given by the following equation:
FeO + CO = Fe + CO2, ΔG° = 8120 J at 1173K The ratio of pco/pco2 for this reaction at 1173K is
FeO + CO = Fe + CO2, ΔG° = 8120 J at 1173K The ratio of pco/pco2 for this reaction at 1173K is
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Zinc oxide is reduced at a constant temperature in a closed reactor using ZnO(s) and C(s) as the only starting materials. The following reactions are assumed to be at thermodynamic equilibrium:
ZnO(s) + C(s) = Zn(g) + CO(g)
2CO(g) = CO2(g) + C(s)
Assume ideal gas behaviour. Based on mole balance, the relationship applicable to the system at equilibrium is
ZnO(s) + C(s) = Zn(g) + CO(g)
2CO(g) = CO2(g) + C(s)
Assume ideal gas behaviour. Based on mole balance, the relationship applicable to the system at equilibrium is
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For the irreversible reaction, Ca + C = CaC2, ΔH°298 = - 60,000 J.mol-1. If a system, initially containing 2 moles of calcium, 3 moles of carbon and one mole of calcium carbide, is allowed to react to completion, the heat evolved, at 298 K will be . . . . . . . . J.
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The half-life period for second order reactions is given as
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The expression for first law of thermodynamics
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The effect of change in temperature on the entropy of formation of an ideal binary solution, ΔSM, id, is such that ΔSM, id
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At absolute zero temperature, for any reaction involving condensed phases
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In a binary system, the difference in chemical potentials of two components (μi - μj) is equal to
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One mole of element P is mixed with one mole of element Q. The entropy of jnixing at 0°K is
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