When a bottle of soda water is opened, carbon dioxide escapes, producing a fizz. This is due to:

a)
A decrease in the solubility with a decrease in temperature

b)
A decrease in the solubility on decreasing pressure and temperature

c)
A decrease in the solubility on increasing the quantity

d)
A decrease in the solubility on decreasing the quantity

Correct answer is option 'B'. Can you explain this answer?

Question

When a bottle of soda water is opened, carbon dioxide escapes, producing a fizz. This is due to:

a)
A decrease in the solubility with a decrease in temperature
b)
A decrease in the solubility on decreasing pressure and temperature
c)
A decrease in the solubility on increasing the quantity
d)
A decrease in the solubility on decreasing the quantity

Correct answer is option 'B'. Can you explain this answer?

Answer

Explanation:

When a bottle of soda water is opened, carbon dioxide escapes, producing a fizz. This is due to the decrease in solubility on decreasing pressure and temperature.

Solubility:
Solubility is the ability of a substance to dissolve in a solvent to form a homogeneous solution. In the case of soda water, carbon dioxide gas is dissolved in water to form a solution.

Pressure and solubility:
The solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid. When the pressure is increased, the solubility of the gas in the liquid increases, and when the pressure is decreased, the solubility of the gas in the liquid decreases.

Temperature and solubility:
The solubility of a gas in a liquid is inversely proportional to the temperature of the liquid. When the temperature is increased, the solubility of the gas in the liquid decreases, and when the temperature is decreased, the solubility of the gas in the liquid increases.

Explanation for the answer:
When a bottle of soda water is opened, the pressure inside the bottle decreases instantly. This decrease in pressure causes the solubility of carbon dioxide gas in the water to decrease, and some of the gas molecules escape from the solution in the form of bubbles. This escape of gas produces the fizz that we observe when we open a bottle of soda water. Additionally, the temperature of the soda water also decreases slightly due to the expansion of the gas molecules, which further decreases the solubility of the carbon dioxide gas in the water.

Conclusion:
In summary, the decrease in pressure and temperature causes the solubility of carbon dioxide gas in water to decrease, and some of the gas molecules escape in the form of bubbles, producing the fizz observed when a bottle of soda water is opened.

Answer

Option  B is the right answer.

Answer

When a bottle of soda water is sealed, the carbon dioxide (CO2) gas is dissolved in the water under high pressure. When you open the bottle, the pressure is released, and as a result, the solubility of carbon dioxide in the water decreases. This decrease in solubility causes the carbon dioxide to escape from the liquid, producing the fizz that you observe. Temperature also plays a role, as gases are generally less soluble in liquids at lower temperatures, but the primary factor here is the decrease in pressure when the bottle is opened.

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