Question
How does the solubility of carbon dioxide change as the temperature of the water increases? Tick (surd ) one box. The solubility decreases square The solubility does not change square The solubility increases square square [1 mark] square ()
Answer
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Arthur
Expert · Tutor for 3 years
Answer
The solubility of carbon dioxide in water decreases as the temperature of the water increases. Therefore, the correct box to tick is "The solubility decreases".
Explanation
## Step 1: The solubility of a gas in a liquid, such as carbon dioxide in water, is influenced by temperature. This is due to the exothermic nature of the dissolving process, where heat is released when a gas dissolves in a liquid.## Step 2: As the temperature of the liquid increases, more energy is provided for the gas to escape from the liquid, thus reducing its solubility. Hence, the higher the temperature, the lower the solubility of the gas.## Step 3: Specifically for carbon dioxide, it dissolves in water to form a weak acid known as carbonic acid. The formation of this acid is also an exothermic process, releasing heat.## Step 4: When the temperature of the water increases, the heat energy provided is sufficient to break the weak bonds in the carbonic acid, leading to its dissociation and the release of carbon dioxide gas.## Step 5: Therefore, as the temperature of the water increases, the solubility of carbon dioxide decreases. Warm or hot water holds less carbon dioxide than cold water.