GATE Metallurgical Thermodynamics: Reaction equilibria and Ellingham diagrams – Previous Year Questions
10 GATE previous year questions on Reaction equilibria and Ellingham diagrams (Metallurgical Thermodynamics, Metallurgical Engineering) with answers and explanations, from every paper.
- GATE 2021 MT Q53 – For 2Cu(s)+SO 2(g) Cu 2S(s)+O 2(g) at 973 K, (p O 2/p SO 2)= (two decimal places). Given G=-100 kJ for 2Cu(s)+0.5S 2(g) Cu 2S(s) and G=292 kJ for SO…
- GATE 2022 MT Q12 – By Sieverts’ law, the equilibrium solubility of nitrogen gas in molten steel is proportional to . Its equilibrium partial pressure is p N 2.
- GATE 2022 MT Q48 – Find the equilibrium ratio p CO/p CO 2 at 1873 K for the reaction Mo(s)+ O 2(g)MoO 2(s) (two decimal places). Given: fG 1873=-262300 J, a MoO 2=0.5,…
- GATE 2023 MT Q14 – At one atmosphere, iron and nickel oxidise according to: 2Fe+ O 22FeO, G=-527400+128T J. 2Ni+ O 22NiO, G=-471200+172T J. Temperature T is in kelvin.…
- GATE 2025 MT Q19 – Consider the gas-phase reaction 2SO 2+ O 22SO 3. If its enthalpy of reaction is negative, which condition promotes a higher equilibrium concentration…
- GATE 2025 MT Q30 – Standard Gibbs free energies of formation of solid oxides per mole of O 2 at 1000 K are: SiO 2: −728 kJ; TiO 2: −737 kJ; VO: −712 kJ; MnO: −624 kJ.…
- GATE 2025 MT Q34 – For the gas-phase reaction CO+12 O 2CO 2, equilibrium partial pressures at a particular temperature are p CO=10-6 atm, p O 2=10-6 atm, and p CO 2=16…
- GATE 2025 MT Q51 – Molten steel at 1900 K containing dissolved hydrogen must be vacuum degassed. The equilibrium hydrogen partial pressure needed to achieve 1 ppm (mass…
- GATE 2025 MT Q53 – Consider the reactions and standard Gibbs free energies (J): Fe(s)+12 O 2(g)FeO(s), G=-264900+65T. 2 H 2(g)+ O 2(g)2 H 2O(g), G=-492900+109T. Assume…
- GATE 2026 MT Q56 – With reference to the Ellingham diagram, the standard Gibbs free-energy changes for oxidation of solid and liquid metal M are: Reaction I: M(s)+O 2(g)…