Answer :
The water will decrease in volume until it reaches 4 degrees Celsius.
When heat is added to water at 0 degrees Celsius, it causes the water molecules to gain energy and move faster. Initially, the heat energy causes the water molecules to vibrate more rapidly within their fixed positions, resulting in an increase in volume. However, as the temperature rises, the water molecules start to move farther apart, causing the volume to increase further.
But at around 4 degrees Celsius, something interesting happens. The water molecules begin to form a unique arrangement due to hydrogen bonding. This arrangement allows the water to occupy less space, resulting in a decrease in volume. This decrease in volume continues until the water reaches its maximum density at approximately 4 degrees Celsius.
Beyond 4 degrees Celsius, as more heat is added, the water molecules start to move even farther apart, leading to an increase in volume once again.
Therefore, the correct answer is B. 4 degrees Celsius.
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