Based on the Langmuir adsorption theory, if the rate of condensation of a gas onto bare surface sites exactly equals the rate of evaporation of the gas from occupied sites, which thermodynamic paramet

Question

Based on the Langmuir adsorption theory, if the rate of condensation of a gas onto bare surface sites exactly equals the rate of evaporation of the gas from occupied sites, which thermodynamic parameter must be mathematically zero?

Prashant Kotian · Accepted Answer

Correct answer: D. The exact point where the rate of condensation strictly equals the rate of evaporation defines the state of dynamic equilibrium for the surface reaction. According to standard thermodynamics, the change in Gibbs free energy () for any process strictly equals zero precisely at equilibrium.

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