Under which conditions would the solubility of a gas be greatest? high pressure and high temperature high pressure and low temperature low pressure and high temperature low pressure and low temperature

high pressure and low temperature

Explanation:

Solubility of a gas is the amount of gas (concentration) that can be dissolved in a liquid.

Based on Henry's law, the solubility (C) of a gas is directly proportional to its pressure (P) above the liquid. i,e,

where kH = Henry's constant

Therefore, the solubility will increase with increase in pressure.

Lowering the temperature will lower the kinetic energy of the gas molecules and prevent them from escaping into the gas phase thereby increasing their solubility in water.

high pressure and low temperature

Explanation:

Generally, solubility varies with temperature. In most substances, an increase in temperature causes an increase in solubility. That's why sugar dissolves better in hot coffee, and the chocolate bar must be dipped in hot milk to make a submarine.

The solubility of gases dissolved in liquids is different from that of solids. The solubility of a gas in water increases with the pressure of the gas on the solvent, if the pressure decreases, the solubility also decreases

The solubility of gases in liquids has a different behavior from that of solids. Both pressure and temperature have a strong influence on its solubility.

What is happening with the molecules? As the temperature rises, the energy of movement (kinetics) of the solute and solvent particles increases, thereby weakening the intermolecular forces. In this way, interactions between its particles and those of solvent are established, favoring the mixing.

In the case of gases, the decrease in intermolecular forces "releases" the gas molecules from the forces that keep them in solution and will escape from the container, so it will be observed that as the temperature increases, the solubility of a gas decreases in a solvent like water.

Gases dissolved in drinking water (mainly oxygen and nitrogen, the main components of the air) are responsible for the small bubbles that appear when the liquid heats up and has not yet reached the boiling point. That is, as it warms up, the molecules acquire enough kinetic energy to leave the liquid. When the water boils, it is completely degassed and a time is required for these gases to return to the liquid.