Gas Phase Equilibrium
Gas Phase Equilibrium - Related Videos
11:00
Determination of the Gas-phase Acidities of Oligopeptides
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Cited by 3 •
2013
The determination of the gas-phase acidities of cysteine-containing oligopeptides is described. The experiments are performed using a triple quadrupole mass spectrometer. The relative acidities of the peptides are measured using collision-induced dissociation experiments, and the quantitative acidities are determined using the extended Cooks kinetic method.
02:20
Dynamic Equilibrium
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2020
A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
07:51
Gas Absorber
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2023
Source: Michael G. Benton and Kerry M. Dooley, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Gas absorbers are used to remove contaminants from gas streams. Multiple designs are used to accomplish this objective1. A packed bed column uses gas and liquid streams running counter to each other in a column packed with loose packing materials, such as ceramics, metals, and plastics, or structured packing1. The packed bed uses surface area created by the packing to...
11:32
Vapor-liquid Equilibrium
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2023
Source: Michael G. Benton and Kerry M. Dooley, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Vapor-liquid equilibrium is paramount in engineering applications such as distillation, environmental modeling, and general process design. Understanding the interactions of components in a mixture is very important in designing, operating and analyzing such separators. The activity coefficient is an excellent tool for relating molecular interactions to mixture...
09:23
A Protocol for Detecting and Scavenging Gas-phase Free Radicals in Mainstream Cigarette Smoke
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Cited by 18 •
2012
Spin-trapping ESR spectroscopy was used to study the effect of plant antioxidants lycopene, pycnogenol and grape seed extract on scavenging gas-phase free radicals in cigarette smoke.
FAQs
At a given temperature, Kp characterizes the equilibrium composition through the gases’ partial pressures. Because the value is tied to temperature, changing temperature can produce a different equilibrium composition and a different Kp. This makes temperature an essential condition when chemists compare gas-phase systems or predict how the established mixture will change.
Changing the pressure or volume of a closed gaseous system can shift its equilibrium composition. These variables influence the partial pressures experienced by the reacting molecules, so the final mixture need not match the original one. Le Chatelier’s principle provides the framework for predicting this response, helping chemists assess how operating conditions affect an equilibrium system.
An altered reactant amount changes the conditions of a gas-phase system and can cause its equilibrium composition to shift. The response reflects the system’s tendency to adjust to the disturbance described by Le Chatelier’s principle. Chemists consider this effect when predicting product formation, comparing possible starting mixtures, or evaluating how reactant supply affects an established equilibrium.
Chemists can follow reactant and product concentrations or partial pressures in a closed system over time. Equilibrium is indicated when these quantities become constant, even though opposing reactions continue. They can then use the established partial pressures to characterize the mixture with Kp, connecting an observable measurement to the system’s equilibrium state.
Ammonia synthesis illustrates how equilibrium reasoning supports industrial process optimization. Chemists use it to predict reaction yields and evaluate how pressure, volume, temperature, or reactant amount may alter the established gas composition. This analysis supports the selection of operating conditions aimed at obtaining a useful product yield rather than treating equilibrium as a fixed, composition-independent result.
In atmospheric and combustion chemistry, equilibrium analysis helps interpret how gaseous reactants and products are distributed under specified conditions. Partial pressures provide a way to describe that composition, while changes in temperature, pressure, volume, or reactant amount help explain why the mixture can shift. The concept therefore links molecular reaction behavior with larger-scale chemical environments.