For SO₂(g)+½O₂(g)⇌SO₃(g), standard Gibbs formation energies at 298 K are −300 and −371 kJ/mol for SO₂ and SO₃. Express Kp as a number ×10¹⁰ (nearest integer). Use R=8.31 J/(mol K).
Reaction ΔG°=−371−(−300)=−71 kJ/mol; elemental oxygen has zero standard formation Gibbs energy. Then $K_p=\exp[71000/(8.31\times298)]\simeq2.8288\times10^{12}$. Divide by 10¹⁰ to obtain 282.88, so enter 283.
More Equilibrium: Laws of thermodynamics. Standard states. Thermochemistry. Thermodynamic functions and their relationships: Gibbs-Helmholtz and Maxwell relations, Gibbs-Duhem equation, Van’t Hoff equation. Criteria of spontaneity and equilibrium. Absolute entropy. Partial molar quantities. Thermodynamics of mixing. Chemical potential. Fugacity, Activity and Activity coefficient. Chemical equilibria. Dependence of equilibrium constant on temperature and pressure. questions
GATE 2024 CY Q58– S (in J\,mol-1K-1) for the given reaction at 298 K is . (Given: K 1=10.6, where K 1 is the…
GATE 2024 CY Q64– 2 mol of a monoatomic ideal gas initially at 5 L and 10 bar expands irreversibly and…
GATE 2025 CY Q29– The thermodynamic criterion/criteria for a spontaneous process is/are
GATE 2025 CY Q64– Consider a Carnot engine with a hot source kept at 500 K. From the hot source, 100 J of…
GATE 2026 CY Q34– The maximum work magnitude in kJ from complete combustion of 1.0 mol methane at constant…
GATE 2022 CY Q65– The surroundings entropy change when 1 mol supercooled water at 263 K freezes at 263 K and…