A mixture of gases O2, H2 and CO are taken in a closed vessel containing charcoal. The graph tha

step 1 Hello everyone. So our question is a mixture of gases O2, H2 and CO and taken in a closed vessel

A mixture of gases O2, H2 and CO are taken in a closed...

Key Concepts

Adsorption on Porous Solids

Adsorption is the process in which molecules from a gas (or liquid) adhere to the surface of a solid. In porous solids, such as activated carbon, the large surface area provides numerous sites for the adsorbing species, leading to a decrease in the number of free gas molecules in the system. This phenomenon is crucial in various fields, including catalysis and gas purification, and is characterized by kinetics that depend on the properties of both the gas and the adsorbent material.

Heterogeneous Catalysis and Reaction Kinetics

Heterogeneous catalysis involves reactions where the reactants in one phase, typically gas or liquid, interact with a catalyst in a different phase, usually a solid. The catalyst provides a surface for the reaction to occur, often altering the reaction pathway and rate. The kinetics in such systems can result in non-linear behaviors, such as an initially rapid change in concentration followed by a slowing down as the reaction approaches equilibrium. This type of kinetic behavior is reflected in the pressure–time graphs in closed systems.

Pressure–Time Behavior in Closed Systems

In a closed system where chemical reactions or adsorption processes occur, the pressure of the gas phase changes over time as reactants are consumed or removed. Initially, there may be a sharp fall in pressure due to rapid adsorption or reaction, followed by a leveling off as the process nears completion or equilibrium is reached. Understanding how pressure varies with time helps in analyzing the dynamics of the process and the efficiency of the adsorption or catalytic reaction taking place.

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