Question

Discuss the factors that influence the solubility of a gas in a liquid.

   Discuss the factors that influence the solubility of a gas in a liquid.

Chemistry

Raymond Chang,… 12th Edition

Chapter 12, Problem 30

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Solved by Expert Mari Davey

07/01/2020

Step 1

According to the explanation, the solubility of the gas decreases when the temperature increases. This can be represented as: \[ \text{{Solubility}} \propto \frac{1}{T} \] where \(T\) is the temperature. This means that the solubility of the gas is inversely Show more…

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Key Concepts

Molecular Interactions

The interactions between gas molecules and the solvent, including attractions and repulsions at a molecular level, significantly influence solubility. Factors such as polarity, hydrogen bonding, and van der Waals forces determine how well a gas can interact with and dissolve in a liquid. This concept is important as it explains the variability in solubility among different gas and solvent combinations and underpins many chemical and physical processes.

Pressure Variations Beyond Partial Pressure

Apart from the direct effect of the partial pressure of the gas, overall pressure exerted on the liquid can also influence solubility by modifying the liquid's density and the volume available for gas dissolution. This concept is important for a broader understanding of how external conditions, such as high pressures in industrial or natural environments, can alter the dissolution process beyond what is predicted by Henry's law alone.

Henry's Law

Henry's law states that the amount of dissolved gas in a liquid is proportional to the partial pressure of that gas above the liquid. This principle is fundamental to understanding gas solubility because it explains how variations in pressure directly impact the concentration of gas dissolved in the liquid, making it a key concept in studies involving gas-liquid interactions.

Temperature Effects

Temperature plays a crucial role in gas solubility where, generally, an increase in temperature decreases the solubility of most gases in liquids. This is due to the exothermic nature of the gas dissolution process, which shifts the equilibrium position according to Le Chatelier's principle. Understanding the temperature dependence is essential in applications that involve controlling or predicting gas solubility under varying thermal conditions.

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