Solubility of a gas in a liquid increases with
- increase of pressure and increase of temperature
- decrease of pressure and increase of temperature
- increase of pressure and decrease of temperature
- decrease of pressure and decrease of temperature.
The Correct Option is C
Approach Solution - 1
According to Henry's Law, the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid. Additionally, solubility decreases with an increase in temperature because higher temperatures give gas molecules more kinetic energy to escape from the liquid phase. Hence, solubility increases with increase in pressure and decrease in temperature.
Correct Answer: increase of P and decrease of T
Approach Solution -2
The correct answer is: increase of P and decrease of T
According to Henry's Law, the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid. Hence, increasing pressure (P) increases gas solubility.
Also, dissolving a gas in a liquid is generally an exothermic process. By Le Chatelier’s Principle, decreasing the temperature (T) shifts the equilibrium towards more dissolution of gas.
Therefore, the solubility of a gas in a liquid increases with increase in pressure and decrease in temperature.
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Concepts Used:
Concentration of Solutions
It is the amount of solute present in one liter of solution.
Concentration in Parts Per Million - The parts of a component per million parts (106) of the solution.
Mass Percentage - When the concentration is expressed as the percent of one component in the solution by mass it is called mass percentage (w/w).
Volume Percentage - Sometimes we express the concentration as a percent of one component in the solution by volume, it is then called as volume percentage
Mass by Volume Percentage - It is defined as the mass of a solute dissolved per 100mL of the solution.
Molarity - One of the most commonly used methods for expressing the concentrations is molarity. It is the number of moles of solute dissolved in one litre of a solution.
Molality - Molality represents the concentration regarding moles of solute and the mass of solvent.
Normality - It is the number of gram equivalents of solute present in one liter of the solution and it is denoted by N.
Formality - It is the number of gram formula present in one litre of solution.